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Curiosity (rover)
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Curiosity
Part of Mars Science Laboratory
Self-portrait by Curiosity at the foot of Mount Sharp in October 2015
TypeMars rover
OwnerNASA
ManufacturerJet Propulsion Laboratory
Specifications
Dimensions2.9 m × 2.7 m × 2.2 m (9 ft 6 in × 8 ft 10 in × 7 ft 3 in)
Dry mass899 kilograms (1,982 lb)
Communication
PowerMMRTG: ~100 W (0.13 hp)
RocketAtlas V 541
Instruments
History
Launched
Deployed
  • August 6, 2012, 05:17 UTC; 13 years ago (August 6, 2012, 05:17 UTC)
  • from the MSL EDLS
LocationGale crater, Mars
Traveled35.97 km (22.35 mi) on Mars as of 27 September 2025[1]
NASA Mars rovers

Curiosity is a car-sized Mars rover that is exploring Gale crater and Mount Sharp on Mars as part of NASA's Mars Science Laboratory (MSL) mission.[2] Launched in 2011 and landed the following year, the rover continues to operate more than a decade after its original two-year mission.

Curiosity was launched from Cape Canaveral (CCAFS) on November 26, 2011, at 15:02:00 UTC and landed on Aeolis Palus inside Gale crater on Mars on August 6, 2012, 05:17:57 UTC.[3][4][5] The Bradbury Landing site was less than 2.4 km (1.5 mi) from the center of the rover's touchdown target after a 560 million km (350 million mi) journey.[6][7]

Mission goals include an investigation of the Martian climate and geology, an assessment of whether the selected field site inside Gale has ever offered environmental conditions favorable for microbial life (including investigation of the role of water), and planetary habitability studies in preparation for human exploration.[8][9]

In December 2012, Curiosity's two-year mission was extended indefinitely.[10][11][12] On August 6, 2022, a detailed overview of accomplishments by the Curiosity rover for the last ten years was reported.[13] The rover is still operational, and as of 1 November 2025, Curiosity has been active on Mars for 4706 sols (4835 total days; 13 years, 87 days) since its landing (see current status).

The NASA/JPL Mars Science Laboratory/Curiosity Project Team was awarded the 2012 Robert J. Collier Trophy by the National Aeronautic Association "In recognition of the extraordinary achievements of successfully landing Curiosity on Mars, advancing the nation's technological and engineering capabilities, and significantly improving humanity's understanding of ancient Martian habitable environments."[14] Curiosity's rover design serves as the basis for NASA's 2021 Perseverance mission, which carries different scientific instruments.

Mission

[edit]
Further information: Timeline of Mars Science Laboratory

Goals and objectives

[edit]
Animation of the Curiosity rover, showing its capabilities

As established by the Mars Exploration Program, the main scientific goals of the MSL mission are to help determine whether Mars could ever have supported life, as well as determining the role of water, and to study the climate and geology of Mars.[8][9] The mission results will also help prepare for human exploration.[9] To contribute to these goals, MSL has eight main scientific objectives:[15]

Biological
  1. Determine the nature and inventory of organic carbon compounds
  2. Investigate the chemical building blocks of life (carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur)
  3. Identify features that may represent the effects of biological processes (biosignatures and biomolecules)
Geological and geochemical
  1. Investigate the chemical, isotopic, and mineralogical composition of the Martian surface and near-surface geological materials
  2. Interpret the processes that have formed and modified rocks and soils
Planetary process
  1. Assess long-timescale (i.e., 4-billion-year) Martian atmospheric evolution processes
  2. Determine present state, distribution, and cycling of water and carbon dioxide
Surface radiation
  1. Characterize the broad spectrum of surface radiation, including galactic and cosmic radiation, solar proton events and secondary neutrons. As part of its exploration, it also measured the radiation exposure in the interior of the spacecraft as it traveled to Mars, and it is continuing radiation measurements as it explores the surface of Mars. This data would be important for a future crewed mission.[16]

About one year into the surface mission, and having assessed that ancient Mars could have been hospitable to microbial life, the MSL mission objectives evolved to developing predictive models for the preservation process of organic compounds and biomolecules; a branch of paleontology called taphonomy.[17] The region it is set to explore has been compared to the Four Corners region of the North American west.[18]

Name

[edit]

A NASA panel selected the name Curiosity following a nationwide student contest that attracted more than 9,000 proposals via the Internet and mail. Twelve-year-old Clara Ma from Sunflower Elementary School in Lenexa, Kansas submitted the winning entry. As her prize, Ma won a trip to NASA's Jet Propulsion Laboratory (JPL) in Pasadena, California, where she signed her name directly onto the rover as it was being assembled.[19]

Ma wrote in her winning essay:

Curiosity is an everlasting flame that burns in everyone's mind. It makes me get out of bed in the morning and wonder what surprises life will throw at me that day. Curiosity is such a powerful force. Without it, we wouldn't be who we are today. Curiosity is the passion that drives us through our everyday lives. We have become explorers and scientists with our need to ask questions and to wonder.[19]

Cost

[edit]

Adjusted for inflation, Curiosity has a life-cycle cost of US$3.2 billion dollars in 2020. By comparison, the 2021 Perseverance rover has a life-cycle cost of US$2.9 billion.[20]

Rover and lander specifications

[edit]
See also: Comparison of embedded computer systems on board the Mars rovers
Two Jet Propulsion Laboratory engineers stand with three vehicles, providing a size comparison of three generations of Mars rovers. Front and center left is the flight spare for the first Mars rover, Sojourner, which landed on Mars in 1997 as part of the Mars Pathfinder Project. On the left is a Mars Exploration Rover (MER) test vehicle that is a working sibling to Spirit and Opportunity, which landed on Mars in 2004. On the right is a test rover for the Mars Science Laboratory, which landed as Curiosity on Mars in 2012.
Sojourner is 65 cm (26 in) long. The Mars Exploration Rovers (MER) are 1.6 m (5 ft 3 in) long. Curiosity on the right is 3 m (9.8 ft) long.

Curiosity is 2.9 m (9 ft 6 in) long by 2.7 m (8 ft 10 in) wide by 2.2 m (7 ft 3 in) high,[21] larger than Mars Exploration Rovers, which are 1.5 m (4 ft 11 in) long and have a mass of 174 kg (384 lb) including 6.8 kg (15 lb) of scientific instruments.[22][23][24] In comparison to Pancam on the Mars Exploration Rovers, the MastCam-34 has 1.25× higher spatial resolution and the MastCam-100 has 3.67× higher spatial resolution.[25]

Curiosity has an advanced payload of scientific equipment on Mars.[26] It is the fourth NASA robotic rover sent to Mars since 1996. Previous successful Mars rovers are Sojourner from the Mars Pathfinder mission (1997), and Spirit (2004–2010) and Opportunity (2004–2018) rovers from the Mars Exploration Rover mission.

Curiosity comprised 23% of the mass of the 3,893 kg (8,583 lb) spacecraft at launch. The remaining mass was discarded in the process of transport and landing.

  • Dimensions: Curiosity has a mass of 899 kg (1,982 lb) including 80 kg (180 lb) of scientific instruments.[22] The rover is 2.9 m (9 ft 6 in) long by 2.7 m (8 ft 10 in) wide by 2.2 m (7 ft 3 in) in height.[21]

The main box-like chassis forms the Warm Electronics Box (WEB).[27]: 52 

Radioisotope pellet within a graphite shell that fuels the generator
Radioisotope Power System for Curiosity at Kennedy Space Center
Radioisotope power systems (RPSs) are generators that produce electricity from the decay of radioactive isotopes, such as plutonium-238, which is a non-fissile isotope of plutonium. Heat given off by the decay of this isotope generates electrical power using thermocouples, providing consistent power during all seasons and through the day and night. Waste heat is also used via pipes to warm systems, freeing electrical power for the operation of the vehicle and instruments.[28][29] Curiosity's RTG is fueled by 4.8 kg (11 lb) of plutonium-238 dioxide supplied by the U.S. Department of Energy.[30]
Curiosity's RTG is the Multi-Mission Radioisotope Thermoelectric Generator (MMRTG), designed and built by Rocketdyne and Teledyne Energy Systems under contract to the U.S. Department of Energy,[31] and fueled and tested by the Idaho National Laboratory.[32] Based on legacy RTG technology, it represents a more flexible and compact development step,[33] and is designed to produce 110 watts of electrical power and about 2,000 watts of thermal power at the start of the mission.[28][29] The MMRTG produces less power over time as its plutonium fuel decays: at its minimum lifetime of 14 years, electrical power output is down to 100 watts.[34][35] The power source generates 9 MJ (2.5 kWh) of electrical energy each day, much more than the solar panels of the now retired Mars Exploration Rovers, which generated about 2.1 MJ (0.58 kWh) each day. The electrical output from the MMRTG charges two rechargeable lithium-ion batteries. This enables the power subsystem to meet peak power demands of rover activities when the demand temporarily exceeds the generator's steady output level. Each battery has a capacity of about 42 ampere hours.
  • Heat rejection system: The temperatures at the landing site vary seasonally and the thermal system warms the rover as needed. The thermal system does so in several ways: passively, through the dissipation to internal components; by electrical heaters strategically placed on key components; and by using the rover heat rejection system (HRS).[27] It uses fluid pumped through 60 m (200 ft) of tubing[citation needed] in the rover body so that sensitive components are kept at optimal temperatures.[36] The fluid loop serves the additional purpose of rejecting heat when the rover has become too warm, and it can also gather waste heat from the power source by pumping fluid through two heat exchangers that are mounted alongside the RTG. The HRS also has the ability to cool components if necessary.[36]
  • Computers: The two identical on-board rover computers, called Rover Compute Element (RCE) contain radiation hardened memory to tolerate the extreme radiation from space and to safeguard against power-off cycles. The computers run the VxWorks real-time operating system (RTOS). Each computer's memory includes 256 kilobytes (kB) of EEPROM, 256 megabytes (MB) of dynamic random-access memory (DRAM), and 2 gigabytes (GB) of flash memory.[37] For comparison, the Mars Exploration Rovers used 3 MB of EEPROM, 128 MB of DRAM, and 256 MB of flash memory.[38]
The RCE computers use the RAD750 Central processing unit (CPU), which is a successor to the RAD6000 CPU of the Mars Exploration Rovers.[39][40] The IBM RAD750 CPU, a radiation-hardened version of the PowerPC 750, can execute up to 400 Million instructions per second (MIPS), while the RAD6000 CPU is capable of up to only 35 MIPS.[41][42] Of the two on-board computers, one is configured as backup and will take over in the event of problems with the main computer.[37] On February 28, 2013, NASA was forced to switch to the backup computer due to a problem with the active computer's flash memory, which resulted in the computer continuously rebooting in a loop. The backup computer was turned on in safe mode and subsequently returned to active status on March 4, 2013.[43] The same problem happened in late March, resuming full operations on March 25, 2013.[44]
The rover has an inertial measurement unit (IMU) that provides 3-axis information on its position, which is used in rover navigation.[37] The rover's computers are constantly self-monitoring to keep the rover operational, such as by regulating the rover's temperature.[37] Activities such as taking pictures, driving, and operating the instruments are performed in a command sequence that is sent from the flight team to the rover.[37] The rover installed its full surface operations software after the landing because its computers did not have sufficient main memory available during flight. The new software essentially replaced the flight software.[7]
The rover has four processors. One of them is a SPARC processor that runs the rover's thrusters and descent-stage motors as it descended through the Martian atmosphere. Two others are PowerPC processors: the main processor, which handles nearly all of the rover's ground functions, and that processor's backup. The fourth one, another SPARC processor, commands the rover's movement and is part of its motor controller box. All four processors are single core.[45]

Communications

[edit]
Curiosity transmits to Earth directly or via three relay satellites in Mars orbit.
  • Communications: Curiosity is equipped with significant telecommunication redundancy by several means: an X band transmitter and receiver that can communicate directly with Earth, and an Ultra high frequency (UHF) Electra-Lite software-defined radio for communicating with Mars orbiters.[27] Communication with orbiters is the main path for data return to Earth, since the orbiters have both more power and larger antennas than the lander, allowing for faster transmission speeds.[27] Telecommunication included a small deep space transponder on the descent stage and a solid-state power amplifier on the rover for X-band. The rover also has two UHF radios,[27] the signals of which orbiting relay satellites are capable of relaying back to Earth. Signals between Earth and Mars take an average of 14 minutes, 6 seconds.[46] Curiosity can communicate with Earth directly at speeds up to 32 kbit/s, but the bulk of the data transfer is being relayed through the Mars Reconnaissance Orbiter and Odyssey orbiter. Data transfer speeds between Curiosity and each orbiter may reach 2000 kbit/s and 256 kbit/s, respectively, but each orbiter is able to communicate with Curiosity for only about eight minutes per day (0.56% of the time).[47] Communication from and to Curiosity relies on internationally agreed space data communications protocols as defined by the Consultative Committee for Space Data Systems.[48]
Jet Propulsion Laboratory (JPL) is the central data distribution hub where selected data products are provided to remote science operations sites as needed. JPL is also the central hub for the uplink process, though participants are distributed at their respective home institutions.[27] At landing, telemetry was monitored by three orbiters, depending on their dynamic location: the 2001 Mars Odyssey, Mars Reconnaissance Orbiter and ESA's Mars Express satellite.[49] As of February 2019, the MAVEN orbiter is being positioned to serve as a relay orbiter while continuing its science mission.[50]

Mobility systems

[edit]
Close-up view of a well-worn wheel on the surface, which also shows the Morse code pattern for JPL.
  • Mobility systems: Curiosity is equipped with six 50 cm (20 in) diameter wheels in a rocker-bogie suspension. These are scaled versions of those used on Mars Exploration Rovers (MER).[27] The suspension system also served as landing gear for the vehicle, unlike its smaller predecessors.[51][52] Each wheel has cleats and is independently actuated and geared, providing for climbing in soft sand and scrambling over rocks. Each front and rear wheel can be independently steered, allowing the vehicle to turn in place as well as execute arcing turns.[27] Each wheel has a pattern that helps it maintain traction but also leaves patterned tracks in the sandy surface of Mars. That pattern is used by on-board cameras to estimate the distance traveled. The pattern itself is Morse code for "JPL" (·--- ·--· ·-··).[53] The rover is capable of climbing sand dunes with slopes up to 12.5°.[54] Based on the center of mass, the vehicle can withstand a tilt of at least 50° in any direction without overturning, but automatic sensors limit the rover from exceeding 30° tilts.[27] After six years of use, the wheels are visibly worn with punctures and tears.[55]
Curiosity can roll over obstacles approaching 65 cm (26 in) in height,[26] and it has a ground clearance of 60 cm (24 in).[56] Based on variables including power levels, terrain difficulty, slippage and visibility, the maximum terrain-traverse speed is estimated to be 200 m (660 ft) per day by automatic navigation.[26] The rover landed about 10 km (6.2 mi) from the base of Mount Sharp,[57] (officially named Aeolis Mons) and it is expected to traverse a minimum of 19 km (12 mi) during its primary two-year mission.[58] It can travel up to 90 m (300 ft) per hour but average speed is about 30 m (98 ft) per hour.[58] The vehicle is 'driven' by several operators led by Vandi Verma, group leader of Autonomous Systems, Mobility and Robotic Systems at JPL,[59][60] who also cowrote the PLEXIL language used to operate the rover.[61][62][63]

Landing

[edit]
Further information: Bradbury Landing
Descent of Curiosity (video-02:26; August 6, 2012)

Curiosity landed in Quad 51 (nicknamed Yellowknife) of Aeolis Palus in the crater Gale.[64][65][66][67] The landing site coordinates are: 4°35′22″S 137°26′30″E / 4.5895°S 137.4417°E / -4.5895; 137.4417.[68][69] The location was named Bradbury Landing on August 22, 2012, in honor of science fiction author Ray Bradbury.[6] Gale, an estimated 3.5 to 3.8 billion-year-old impact crater, is hypothesized to have first been gradually filled in by sediments; first water-deposited, and then wind-deposited, possibly until it was completely covered. Wind erosion then scoured out the sediments, leaving an isolated 5.5 km (3.4 mi) mountain, Aeolis Mons ("Mount Sharp"), at the center of the 154 km (96 mi) wide crater. Thus, it is believed that the rover may have the opportunity to study two billion years of Martian history in the sediments exposed in the mountain. Additionally, its landing site is near an alluvial fan, which is hypothesized to be the result of a flow of ground water, either before the deposition of the eroded sediments or else in relatively recent geologic history.[70][71]

According to NASA, an estimated 20,000 to 40,000 heat-resistant bacterial spores were on Curiosity at launch, and as many as 1,000 times that number may not have been counted.[72]

Rover's landing system

[edit]
Main article: Mars Science Laboratory–Landing
NASA video describing the landing procedure. NASA dubbed the landing as "Seven Minutes of Terror"

Previous NASA Mars rovers became active only after the successful entry, descent and landing on the Martian surface. Curiosity, on the other hand, was active when it touched down on the surface of Mars, employing the rover suspension system for the final set-down.[73]

Curiosity transformed from its stowed flight configuration to a landing configuration while the MSL spacecraft simultaneously lowered it beneath the spacecraft descent stage with a 20 m (66 ft) tether from the "sky crane" system to a soft landing – wheels down – on the surface of Mars.[74][75][76][77] After the rover touched down it waited two seconds to confirm that it was on solid ground then fired several pyrotechnic fasteners activating cable cutters on the bridle to free itself from the spacecraft descent stage. The descent stage then flew away to a crash landing, and the rover prepared itself to begin the science portion of the mission.[78]

Travel status

[edit]

As of August 16, 2024, the rover has driven 35.5 km (22.1 mi) from its landing site over 4706 sols (Martian days).[20]

Duplicate testing rovers

[edit]
MAGGIE Rover
Scarecrow rover

Curiosity has two full sized, vehicle system test beds (VSTB), a twin rover used for testing and problem solving, MAGGIE rover (Mars Automated Giant Gizmo for Integrated Engineering) with a computer brain and a Scarecrow rover without a computer brain. They are housed at the JPL Mars Yard for problem solving on simulated Mars terrain.[79][80]

Scientific instruments

[edit]
Instrument location diagram

The general sample analysis strategy begins with high-resolution cameras to look for features of interest. If a particular surface is of interest, Curiosity can vaporize a small portion of it with an infrared laser and examine the resulting spectra signature to query the rock's elemental composition. If that signature is intriguing, the rover uses its long arm to swing over a microscope and an X-ray spectrometer to take a closer look. If the specimen warrants further analysis, Curiosity can drill into the boulder and deliver a powdered sample to either the Sample Analysis at Mars (SAM) or the CheMin analytical laboratories inside the rover.[81][82][83]

The MastCam, Mars Hand Lens Imager (MAHLI), and Mars Descent Imager (MARDI) cameras were developed by Malin Space Science Systems and they all share common design components, such as on-board digital image processing boxes, 1600 × 1200 charge-coupled device (CCDs), and an RGB Bayer pattern filter.[84][85][86][87][25][88]

In total, the rover carries 17 cameras: HazCams (8), NavCams (4), MastCams (2), MAHLI (1), MARDI (1), and ChemCam (1).[89]

Mast Camera (Mastcam)

[edit]
The turret at the end of the robotic arm holds five devices.

The Mastcam system provides multiple spectra and true-color imaging with two cameras.[85] The cameras can take true-color images at 1600×1200 pixels and up to 10 frames per second hardware-compressed video at 720p (1280×720).[90]

One Mastcam camera is the Medium Angle Camera (MAC; also referred to as Mastcam-34 and Mastcam-Left), which has a 34 mm (1.3 in) focal length, a 15° field of view, and can yield 22 cm/pixel (8.7 in/pixel) scale at 1 km (0.62 mi). The other camera in the Mastcam is the Narrow Angle Camera (NAC; also Mastcam-100 and Mastcam-Right), which has a 100 mm (3.9 in) focal length, a 5.1° field of view, and can yield 7.4 cm/pixel (2.9 in/pixel) scale at 1 km (0.62 mi).[85] Malin also developed a pair of Mastcams with zoom lenses,[91] but these were not included in the rover because of the time required to test the new hardware and the looming November 2011 launch date.[92] However, the improved zoom version was selected to be incorporated on the Mars 2020 mission as Mastcam-Z.[93]

Each camera has eight gigabytes of flash memory, which is capable of storing over 5,500 raw images, and can apply real time lossless data compression.[85] The cameras have an autofocus capability that allows them to focus on objects from 2.1 m (6 ft 11 in) to infinity.[25] In addition to the fixed RGBG Bayer pattern filter, each camera has an eight-position filter wheel. While the Bayer filter reduces visible light throughput, all three colors are mostly transparent at wavelengths longer than 700 nm, and have minimal effect on such infrared observations.[85]

Chemistry and Camera complex (ChemCam)

[edit]
Main article: Chemistry and Camera complex
The internal spectrometer (left) and the laser telescope (right) for the mast
First laser spectrum of chemical elements from ChemCam on Curiosity ("Coronation" rock, August 19, 2012)

ChemCam is a suite of two remote sensing instruments combined as one: a laser-induced breakdown spectroscopy (LIBS) and a Remote Micro Imager (RMI) telescope. The ChemCam instrument suite was developed by the French CESR laboratory and the Los Alamos National Laboratory.[94][95][96] The flight model of the mast unit was delivered from the French CNES to Los Alamos National Laboratory.[97] The purpose of the LIBS instrument is to provide elemental compositions of rock and regolith, while the RMI gives ChemCam scientists high-resolution images of the sampling areas of the rocks and regolith that LIBS targets.[94][98] The LIBS instrument can target a rock or regolith sample up to 7 m (23 ft) away, vaporizing a small amount of it with about 50 to 75 5-nanosecond pulses from a 1067 nm infrared laser and then observes the spectrum of the light emitted by the vaporized rock.[99]

ChemCam has the ability to record up to 6,144 different wavelengths of ultraviolet, visible, and infrared light.[100] Detection of the ball of luminous plasma is done in the visible, near-UV and near-infrared ranges, between 240 nm and 800 nm.[94] The first initial laser testing of the ChemCam by Curiosity on Mars was performed on a rock, N165 ("Coronation" rock), near Bradbury Landing on August 19, 2012.[101][102][103] The ChemCam team expects to take approximately one dozen compositional measurements of rocks per day.[104] Using the same collection optics, the RMI provides context images of the LIBS analysis spots. The RMI resolves 1 mm (0.039 in) objects at 10 m (33 ft) distance, and has a field of view covering 20 cm (7.9 in) at that distance.[94]

[edit]
Main article: Navcam
First full-resolution Navcam images

The rover has two pairs of black and white navigation cameras mounted on the mast to support ground navigation.[105][106] The cameras have a 45° angle of view and use visible light to capture stereoscopic 3-D imagery.[106][107]

Rover Environmental Monitoring Station (REMS)

[edit]
Main article: Rover Environmental Monitoring Station

REMS comprises instruments to measure the Mars environment: humidity, pressure, temperatures, wind speeds, and ultraviolet radiation.[108] It is a meteorological package that includes an ultraviolet sensor provided by the Spanish Ministry of Education and Science. The investigative team is led by Javier Gómez-Elvira of the Spanish Astrobiology Center and includes the Finnish Meteorological Institute as a partner.[109][110] All sensors are located around three elements: two booms attached to the rover's mast, the Ultraviolet Sensor (UVS) assembly located on the rover top deck, and the Instrument Control Unit (ICU) inside the rover body. REMS provides new clues about the Martian general circulation, micro scale weather systems, local hydrological cycle, destructive potential of UV radiation, and subsurface habitability based on ground-atmosphere interaction.[109]

Hazard avoidance cameras (Hazcams)

[edit]
Main article: Hazcam

The rover has four pairs of black and white navigation cameras called hazcams, two pairs in the front and two pairs in the back.[105][111] They are used for autonomous hazard avoidance during rover drives and for safe positioning of the robotic arm on rocks and regolith.[111] Each camera in a pair is hardlinked to one of two identical main computers for redundancy; only four out of the eight cameras are in use at any one time. The cameras use visible light to capture stereoscopic three-dimensional (3-D) imagery.[111] The cameras have a 120° field of view and map the terrain at up to 3 m (9.8 ft) in front of the rover.[111] This imagery safeguards against the rover crashing into unexpected obstacles, and works in tandem with software that allows the rover to make its own safety choices.[111]

Mars Hand Lens Imager (MAHLI)

[edit]
Main article: Mars Hand Lens Imager
Mars Hand Lens Imager (MAHLI)
Alpha Particle X-Ray Spectrometer (APXS)

MAHLI is a camera on the rover's robotic arm, and acquires microscopic images of rock and regolith. MAHLI can take true-color images at 1600×1200 pixels with a resolution as high as 14.5 µm per pixel. MAHLI has an 18.3 to 21.3 mm (0.72 to 0.84 in) focal length and a 33.8–38.5° field of view.[86] MAHLI has both white and ultraviolet Light-emitting diode (LED) illumination for imaging in darkness or fluorescence imaging. MAHLI also has mechanical focusing in a range from infinite to millimeter distances.[86] This system can make some images with focus stacking processing.[112] MAHLI can store either the raw images or do real time lossless predictive or JPEG compression. The calibration target for MAHLI includes color references, a metric bar graphic, a 1909 VDB Lincoln penny, and a stair-step pattern for depth calibration.[113]

Alpha Particle X-ray Spectrometer (APXS)

[edit]
See also: Alpha particle X-ray spectrometer

The APXS instrument irradiates samples with alpha particles and maps the spectra of X-rays that are re-emitted for determining the elemental composition of samples.[114] Curiosity's APXS was developed by the Canadian Space Agency (CSA).[114] MacDonald Dettwiler (MDA), the Canadian aerospace company that built the Canadarm and RADARSAT, were responsible for the engineering design and building of the APXS. The APXS science team includes members from the University of Guelph, the University of New Brunswick, the University of Western Ontario, NASA, the University of California, San Diego and Cornell University.[115] The APXS instrument takes advantage of particle-induced X-ray emission (PIXE) and X-ray fluorescence, previously exploited by the Mars Pathfinder and the two Mars Exploration Rovers.[114][116]

Chemistry and Mineralogy (CheMin)

[edit]
Main article: CheMin
Curiosity's CheMin Spectrometer on Mars (September 11, 2012), with sample inlet seen closed and open
First X-ray diffraction view of Martian regolith (Curiosity at Rocknest, October 17, 2012)[117]

CheMin is the Chemistry and Mineralogy X-ray powder diffraction and fluorescence instrument.[118] CheMin is one of four spectrometers. It can identify and quantify the abundance of the minerals on Mars. It was developed by David Blake at NASA Ames Research Center and the Jet Propulsion Laboratory,[119] and won the 2013 NASA Government Invention of the year award.[120] The rover can drill samples from rocks and the resulting fine powder is poured into the instrument via a sample inlet tube on the top of the vehicle. A beam of X-rays is then directed at the powder and the crystal structure of the minerals deflects it at characteristic angles, allowing scientists to identify the minerals being analyzed.[121]

On October 17, 2012, at "Rocknest", the first X-ray diffraction analysis of Martian regolith was performed. The results revealed the presence of several minerals, including feldspar, pyroxenes and olivine, and suggested that the Martian regolith in the sample was similar to the "weathered basaltic soils" of Hawaiian volcanoes.[117] The paragonetic tephra from a Hawaiian cinder cone has been mined to create Martian regolith simulant for researchers to use since 1998.[122][123]

CheMin eventually found carbonates in the form of crystalline siderite (FeCO3). One rock contained over 10 % of the mineral. Some rocks also were composed of plagioclase with the elements sodium (Na)–, Ca-, and aluminum (Al)–, as well as Ca- and Mg-bearing silicate mineral pyroxene. Other minerals found were calcium sulfates, magnesium sulfates, different amounts of iron oxyhydroxides, and an unidentified x-ray amorphous material. Rover's Chemistry and Mineralogy (CheMin) instrument uses x-ray diffraction to determine sample mineralogy. The names of the rock formations and drill sites are CA, Canaima; TC, Tapo Caparo; UB, Ubajara; and SQ, Sequoia. V[124]

Sample Analysis at Mars (SAM)

[edit]
Main article: Sample Analysis at Mars
First night-time pictures on Mars (white-light left/UV right) (Curiosity viewing Sayunei rock, January 22, 2013)

The SAM instrument suite analyzes organics and gases from both atmospheric and solid samples. It consists of instruments developed by the NASA Goddard Space Flight Center, the NASA Jet Propulsion Laboratory the Laboratoire atmosphères, milieux, observations spatiales (LATMOS), the Laboratoire Inter-Universitaire des Systèmes Atmosphériques (LISA) (jointly operated by France's CNRS and Parisian universities), and Honeybee Robotics, along with many additional external partners.[82][125][126] The three main instruments are a Quadrupole Mass Spectrometer (QMS), a gas chromatograph (GC) and a tunable laser spectrometer (TLS). These instruments perform precision measurements of oxygen and carbon isotope ratios in carbon dioxide (CO2) and methane (CH4) in the atmosphere in order to distinguish between their geochemical or biological origin.[82][126][127][128]

Dust Removal Tool (DRT)

[edit]
First use of Curiosity's Dust Removal Tool (DRT) (January 6, 2013); Ekwir_1 rock before/after cleaning (left) and closeup (right)

The Dust Removal Tool (DRT) is a motorized, wire-bristle brush on the turret at the end of Curiosity's arm. The DRT was first used on a rock target named Ekwir_1 on January 6, 2013. Honeybee Robotics built the DRT.[129]

Radiation assessment detector (RAD)

[edit]
Main article: Radiation assessment detector

The role of the Radiation assessment detector (RAD) instrument is to characterize the broad spectrum of radiation environment found inside the spacecraft during the cruise phase and while on Mars. These measurements have never been done before from the inside of a spacecraft in interplanetary space. Its primary purpose is to determine the viability and shielding needs for potential human explorers, as well as to characterize the radiation environment on the surface of Mars, which it started doing immediately after MSL landed in August 2012.[130] Funded by the Exploration Systems Mission Directorate at NASA Headquarters and Germany's Space Agency (DLR), RAD was developed by Southwest Research Institute (SwRI) and the extraterrestrial physics group at Christian-Albrechts-Universität zu Kiel, Germany.[130][131]

Dynamic Albedo of Neutrons (DAN)

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Main article: Dynamic Albedo of Neutrons

The DAN instrument employs a neutron source and detector for measuring the quantity and depth of hydrogen or ice and water at or near the Martian surface.[132] The instrument consists of the detector element (DE) and a 14.1 MeV pulsing neutron generator (PNG). The die-away time of neutrons is measured by the DE after each neutron pulse from the PNG. DAN was provided by the Russian Federal Space Agency[133][134] and funded by Russia.[135]

Mars Descent Imager (MARDI)

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MARDI camera

MARDI is fixed to the lower front left corner of the body of Curiosity. During the descent to the Martian surface, MARDI took color images at 1600×1200 pixels with a 1.3-millisecond exposure time starting at distances of about 3.7 km (2.3 mi) to near 5 m (16 ft) from the ground, at a rate of four frames per second for about two minutes.[87][136] MARDI has a pixel scale of 1.5 m (4 ft 11 in) at 2 km (1.2 mi) to 1.5 mm (0.059 in) at 2 m (6 ft 7 in) and has a 90° circular field of view. MARDI has eight gigabytes of internal buffer memory that is capable of storing over 4,000 raw images. MARDI imaging allowed the mapping of surrounding terrain and the location of landing.[87] JunoCam, built for the Juno spacecraft, is based on MARDI.[137]

Robotic arm

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First use of Curiosity's scooper as it sifts a load of sand at Rocknest (October 7, 2012)
First drill tests (John Klein rock, Yellowknife Bay, February 2, 2013).[138]

The rover has a 2.1 m (6 ft 11 in) long robotic arm with a cross-shaped turret holding five devices that can spin through a 350° turning range.[139][140] The arm makes use of three joints to extend it forward and to stow it again while driving. It has a mass of 30 kg (66 lb) and its diameter, including the tools mounted on it, is about 60 cm (24 in).[141] It was designed, built, and tested by MDA US Systems, building upon their prior robotic arm work on the Mars Surveyor 2001 Lander, the Phoenix lander, and the two Mars Exploration Rovers, Spirit and Opportunity.[142]

Two of the five devices are in-situ or contact instruments known as the X-ray spectrometer (APXS), and the Mars Hand Lens Imager (MAHLI camera). The remaining three are associated with sample acquisition and sample preparation functions: a percussion drill; a brush; and mechanisms for scooping, sieving, and portioning samples of powdered rock and regolith.[139][141] The diameter of the hole in a rock after drilling is 1.6 cm (0.63 in) and up to 5 cm (2.0 in) deep.[140][143] The drill carries two spare bits.[143][144] The rover's arm and turret system can place the APXS and MAHLI on their respective targets, and also obtain powdered sample from rock interiors, and deliver them to the SAM and CheMin analyzers inside the rover.[140]

Since early 2015 the percussive mechanism in the drill that helps chisel into rock has had an intermittent electrical short.[145] On December 1, 2016, the motor inside the drill caused a malfunction that prevented the rover from moving its robotic arm and driving to another location.[146] The fault was isolated to the drill feed brake,[147] and internal debris is suspected of causing the problem.[145] By December 9, 2016, driving and robotic arm operations were cleared to continue, but drilling remained suspended indefinitely.[148] The Curiosity team continued to perform diagnostics and testing on the drill mechanism throughout 2017,[149] and resumed drilling operations on May 22, 2018.[150]

Media, cultural impact and legacy

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Further information: Timeline of Mars Science Laboratory § Current status
Celebration erupts at NASA with the rover's successful landing on Mars (August 6, 2012).

Live video showing the first footage from the surface of Mars was available at NASA TV, during the late hours of August 6, 2012, PDT, including interviews with the mission team. The NASA website momentarily became unavailable from the overwhelming number of people visiting it,[151] and a 13-minute NASA excerpt of the landings on its YouTube channel was halted an hour after the landing by an automated copyright takedown notice from Scripps Local News, which prevented access for several hours.[152] Around 1,000 people gathered in New York City's Times Square, to watch NASA's live broadcast of Curiosity's landing, as footage was being shown on the giant screen.[153] Bobak Ferdowsi, Flight Director for the landing, became an Internet meme and attained Twitter celebrity status, with 45,000 new followers subscribing to his Twitter account, due to his Mohawk hairstyle with yellow stars that he wore during the televised broadcast.[154][155]

On August 13, 2012, U.S. President Barack Obama, calling from aboard Air Force One to congratulate the Curiosity team, said, "You guys are examples of American know-how and ingenuity. It's really an amazing accomplishment".[156] (Video (07:20) Archived May 21, 2013, at the Wayback Machine)

Scientists at the Getty Conservation Institute in Los Angeles, California, viewed the CheMin instrument aboard Curiosity as a potentially valuable means to examine ancient works of art without damaging them. Until recently, only a few instruments were available to determine the composition without cutting out physical samples large enough to potentially damage the artifacts. CheMin directs a beam of X-rays at particles as small as 400 μm (0.016 in)[157] and reads the radiation scattered back to determine the composition of the artifact in minutes. Engineers created a smaller, portable version named the X-Duetto. Fitting into a few briefcase-sized boxes, it can examine objects on site, while preserving their physical integrity. It is now being used by Getty scientists to analyze a large collection of museum antiques and the Roman ruins of Herculaneum, Italy.[158]

Prior to the landing, NASA and Microsoft released Mars Rover Landing, a free downloadable game on Xbox Live that uses Kinect to capture body motions, which allows users to simulate the landing sequence.[159]

U.S. flag medallion
Plaque with President Obama and Vice President Biden's signatures

NASA gave the general public the opportunity from 2009 until 2011 to submit their names to be sent to Mars. More than 1.2 million people from the international community participated, and their names were etched into silicon using an electron-beam machine used for fabricating micro devices at JPL, and this plaque is now installed on the deck of Curiosity.[160] In keeping with a 40-year tradition, a plaque with the signatures of President Barack Obama and Vice President Joe Biden was also installed. Elsewhere on the rover is the autograph of Clara Ma, the 12-year-old girl from Kansas who gave Curiosity its name in an essay contest, writing in part that "curiosity is the passion that drives us through our everyday lives".[161]

On August 6, 2013, Curiosity audibly played "Happy Birthday to You" in honor of the one Earth year mark of its Martian landing, the first time for a song to be played on another planet. This was also the first time music was transmitted between two planets.[162]

On June 24, 2014, Curiosity completed a Martian year – 687 Earth days – after finding that Mars once had environmental conditions favorable for microbial life.[163] Curiosity served as the basis for the design of the Perseverance rover for the Mars 2020 rover mission. Some spare parts from the build and ground test of Curiosity are being used in the new vehicle, but it will carry a different instrument payload.[164]

In 2014, project chief engineer wrote a book detailing the development of the Curiosity rover. "Mars Rover Curiosity: An Inside Account from Curiosity's Chief Engineer," is a firsthand account of the development and landing of the Curiosity Rover.[165]

On August 5, 2017, NASA celebrated the fifth anniversary of the Curiosity rover mission landing, and related exploratory accomplishments, on the planet Mars.[11][12] (Videos: Curiosity's First Five Years (02:07); Curiosity's POV: Five Years Driving (05:49); Curiosity's Discoveries About Gale Crater (02:54))

As reported in 2018, drill samples taken in 2015 uncovered organic molecules of benzene and propane in 3 billion year old rock samples in Gale.[166][167][168]

In popular culture, the launch of Curiosity is referenced in the music video for Harry Styles' 2023 song, "Satellite".[169]

In March 2024 it was published that Curiosity discovered long chain alkanes with up to 12 consecutive carbon atoms, in mudstone in Gale crater. The origin of these molecules is unknown. They could be derived from either abiotic or biological sources.[170]

Images

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Wikimedia Commons has media related to Curiosity rover.

Components of Curiosity

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  • Mast head with ChemCam, MastCam-34, MastCam-100, NavCam
    Mast head with ChemCam, MastCam-34, MastCam-100, NavCam
  • One of the six wheels on Curiosity
    One of the six wheels on Curiosity
  • High-gain (right) and low-gain (left) antennas
    High-gain (right) and low-gain (left) antennas
  • UV sensor
    UV sensor


Example rover images

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  • Curiosity's first image after landing (without clear dust cover, 6 August 2012)
    Curiosity's first image after landing (without clear dust cover, 6 August 2012)
  • Curiosity's self-portrait (7 September 2012; color-corrected)
    Curiosity's self-portrait (7 September 2012; color-corrected)
  • Comparison of color versions (raw, natural, white balance) of Aeolis Mons on Mars (23 August 2012)
    Comparison of color versions (raw, natural, white balance) of Aeolis Mons on Mars (23 August 2012)
  • Layers at the base of Aeolis Mons. The dark rock in inset is the same size as Curiosity.
    Layers at the base of Aeolis Mons. The dark rock in inset is the same size as Curiosity.
Curiosity's view from Rocknest looking east toward Point Lake (center) on the way to Glenelg (November 26, 2012; white balanced; raw color version)

See also

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References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Curiosity (rover)

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from Grokipedia
The Curiosity rover, part of NASA's Mars Science Laboratory (MSL) mission, is a car-sized robotic explorer designed to investigate whether Mars has ever supported microbial life by assessing past habitability through geological and chemical analysis. Launched on November 26, 2011, aboard an Atlas V rocket from Cape Canaveral, Florida, it successfully landed in Gale Crater on August 6, 2012, using a novel "sky crane" maneuver to gently lower the 899-kilogram (1,982-pound) vehicle onto the Martian surface. Measuring approximately 3 meters (10 feet) long, 2.7 meters (9 feet) wide, and 2.2 meters (7 feet) tall (excluding its robotic arm), Curiosity is powered by a Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) that converts heat from the radioactive decay of plutonium-238 into about 110 watts of electricity, enabling long-term operations independent of solar panels. Equipped with a suite of advanced instruments, the rover features the Mastcam for high-resolution color imaging and 3D mapping, ChemCam for remote laser-induced breakdown spectroscopy to analyze rock compositions from afar, the Alpha Particle X-ray Spectrometer (APXS) for elemental detection in soils and rocks, the Sample Analysis at Mars (SAM) suite for identifying organic molecules and gases, and CheMin for mineralogical X-ray diffraction analysis of powdered samples. Additional tools include the Mars Hand Lens Imager (MAHLI) for microscopic imaging, the Radiation Assessment Detector (RAD) to measure space radiation, and the Rover Environmental Monitoring Station (REMS) to track weather conditions like temperature, pressure, and humidity. These capabilities allow Curiosity to drill into rocks, scoop soil, and conduct on-site laboratory-like experiments, supporting its primary goals of characterizing the planet's climate and geology over billions of years. Since landing, Curiosity has traversed over 35 kilometers (22 miles) within Gale Crater, ascending the base of Mount Sharp—a layered mountain offering a record of Mars' environmental history—and making landmark discoveries such as evidence of ancient freshwater lakes, clay minerals indicative of habitable conditions around 3.5 billion years ago, and the detection of organic carbon compounds in rocks. As of November 2025, marking 13 years on Mars (over 4,600 Martian sols), the rover remains active, adapting to challenges like wheel wear through software updates for enhanced autonomy and energy efficiency, such as multitasking during drives and selective "napping" to conserve power from its MMRTG. In November 2025, Curiosity captured a high-resolution panoramic image from high on the slopes of Mount Sharp, combining photos from two different Martian days to show changing light across ancient water-shaped terrain, demonstrating its ability to transmit high-quality images from approximately 225 million miles away. Current investigations focus on boxwork mineral formations potentially linked to subsurface water flows, probing whether microbial life could have persisted in Mars' ancient underground environments.

Mission Background

Objectives and Science Goals

The primary objective of the Curiosity rover mission, part of NASA's (MSL), is to assess the of ancient Mars by determining whether the planet ever possessed environmental conditions suitable for microbial life. This involves investigating the presence of liquid water, sources such as oxidants and reductants, and essential organic compounds that could have supported basic life forms. By analyzing and rock samples, the mission seeks to identify the building blocks of life—carbon, , , oxygen, , and —and detect any features suggestive of biological processes, thereby evaluating Mars' biological potential. Secondary goals encompass a broader examination of Mars' geological and climatic evolution, as well as contemporary surface processes. The rover aims to characterize the planet's through the study of layered sedimentary rocks, reconstructing the history of water-related environments and mineral formation over billions of years. It also investigates past climate conditions by analyzing evidence of long-term environmental changes, such as shifts from wetter to drier epochs, and observes current atmospheric and surface dynamics via and sample collection. Additionally, Curiosity measures present-day radiation levels on the Martian surface to inform strategies for future human missions. These objectives are pursued primarily within Gale Crater, selected as the landing site due to its diverse geological features, including layered sediments that record Mars' environmental history. A key focus is the exploration of Mount Sharp (Aeolis Mons), the crater's central mound, which provides a vertical transect through approximately 5 kilometers of stratified rock layers representing successive epochs of Martian geology—from ancient habitable lakebeds at the base to more recent arid deposits higher up. This stratigraphic approach allows for a chronological assessment of habitability and planetary change. The mission's prime duration was planned for one Mars year, equivalent to 687 days, to achieve these goals during the rover's initial operational phase following landing on August 6, 2012. However, due to the rover's robust performance and the scientific value of ongoing , the mission has been extended indefinitely, enabling continued pursuit of these objectives well beyond the original timeline.

Development History

The (MSL) mission, featuring the rover, emerged from NASA's as a flagship initiative to advance capabilities. In early 2004, NASA announced the MSL as the next major mission, building on the success of the Mars Exploration Rovers Spirit and Opportunity, with a focus on delivering a larger, more advanced mobile laboratory to Mars. The mission concept underwent formulation starting in September 2003, followed by a Mission Concept Review in October 2003, and NASA solicited instrument proposals in April 2004, selecting eight investigations in December 2004 to form the rover's scientific . This selection process solidified MSL's role in assessing Mars' , marking a shift toward integrated and science objectives in design. Development of the Curiosity rover commenced in 2004 at NASA's in , where the vehicle was assembled in clean room facilities to prevent contamination. Key milestones included the Preliminary Design Review in June 2006 and the Critical Design Review in June 2007, which validated the overall architecture. By 2011, the rover underwent rigorous pre-launch preparations, including vibration testing to simulate launch stresses, thermal vacuum chamber simulations of space and Martian environments, and system integration completed in May 2011. The fully assembled rover was then shipped to in June 2011 for final encapsulation. These tests ensured the rover's resilience against the harsh conditions of launch and interplanetary travel. Significant engineering challenges were overcome during development, particularly the integration of the (MMRTG) as the primary power source, which required careful handling of its plutonium-based and addressed unexpected power degradation issues that adjusted mission parameters like sample processing capacity. Another innovation was the sky crane landing system, a novel descent mechanism designed to gently lower the 900-kilogram rover using tethered rockets, necessitated by Curiosity's size exceeding previous or legged landing limits; this required extensive modeling and testing to resolve hardware, software, and dynamics complexities. The MSL project was led by JPL, with contributions from NASA centers including Ames, , Johnson, Kennedy, and Langley, alongside international partners such as the French space agency (part of ESA) for the Chemistry and Camera (ChemCam) instrument. Pre-launch delays arose from software verifications, hardware integration setbacks, and late component deliveries, shifting the timeline from a planned 2009 launch to November 2011; these adjustments added approximately $900 million to the budget but enhanced overall reliability.

Cost and Funding

The Mars Science Laboratory (MSL) mission, which deployed the Curiosity rover, had a total life-cycle cost of approximately $2.5 billion as of its 2011 launch, encompassing development, launch, and initial operations. This figure represented an increase from the initial estimate of $1.6 billion established in 2006 during project confirmation. Cost overruns stemmed primarily from a two-year launch delay, challenges in developing the innovative sky crane landing system, late component deliveries, and technical issues such as contamination in the sample acquisition and handling subsystem. These factors drove development costs from an original $969 million to $1.8 billion, an 86% overrun, with NASA notifying Congress in December 2008 under the terms of the NASA Appropriation Act of 2005 to secure approvals for the additional funding. Overall, the mission's budget grew through three funding increases totaling $137 million between February 2009 and December 2010. A rough breakdown of the $2.5 billion total included about $1.8 billion for the , its scientific , and mission development; approximately $195 million for the and associated services; and around $300 million for ground operations, support, and initial post-launch activities. Formulation phases accounted for $515.5 million, while planned operations were budgeted at $158.8 million for the prime mission period. Funding for the MSL mission came primarily from NASA's Science Mission Directorate within the agency's annual congressional appropriations, as part of the broader . International partner agencies provided key contributions for specific instruments, reducing NASA's burden for those components: the French space agency funded and led development of the Chemistry and Camera (ChemCam) instrument; Russia's Federal Space Agency supported the Dynamic Albedo of Neutrons (DAN) experiment; Spain's Ministry of Science and Innovation backed the Rover Environmental Monitoring Station (REMS); and the Canadian Space Agency contributed to the (APXS). Post-landing operations for Curiosity have been sustained at an annual cost of approximately $62 million, drawn from NASA's ongoing budget to support rover activities, data analysis, and science team efforts.

Design and Engineering

Overall Specifications

The Curiosity rover measures 3 meters (9.5 feet) in length, 2.7 meters (8.9 feet) in width, and 2.2 meters (7.2 feet) in height, making it roughly the size of a compact car and significantly larger than previous Mars rovers like Spirit and Opportunity. At launch, the rover had a total mass of 899 kilograms (1,982 pounds), incorporating a 75-kilogram payload that includes its suite of analytical instruments for geological and atmospheric investigations. The rover's structural framework consists primarily of an aluminum and wheels for durability and strength-to-weight efficiency, integrated with composite materials in select components for enhanced and reduced mass; it features a six-wheel suspension system that provides stability and obstacle traversal capabilities up to 65 centimeters high across uneven Martian terrain. Power for the rover is supplied by a (MMRTG) fueled by , delivering approximately 110 watts of electrical output at the start of the mission, with power levels gradually declining over time due to ; two rechargeable lithium-ion batteries supplement this by managing peak loads during high-demand activities such as instrument operations or mobility. The onboard computing system employs redundant processors, which are radiation-hardened implementations of the PowerPC 750 architecture, paired with 256 MB of (DRAM) and 2 GB of flash storage to support , command execution, and autonomous features that allow the to independently select safe paths and avoid hazards.

Power and Mobility Systems

Curiosity's power system relies on a (MMRTG), which converts heat from the natural decay of into using thermocouples. The MMRTG contains 4.8 kilograms of dioxide fuel, producing an initial electrical output of approximately 110 watts, with thermal power around 2,000 watts. Over time, the power output degrades at about 4% per year due to the of the fuel and thermoelectric couple efficiency loss. As of 2025, the MMRTG's electrical output has declined to approximately 100 watts. To manage variable power demands, the rover employs two rechargeable lithium-ion batteries, each with a capacity of ampere-hours, which store excess from the MMRTG and provide bursts for energy-intensive tasks such as drilling into rock or operating instruments. These batteries undergo multiple charge-discharge cycles per Martian (day), with the power subsystem carefully budgeting allocation between mobility, science operations, and survival heating to ensure mission longevity. For surface traversal, Curiosity features a six-wheel suspension system, enabling it to navigate slopes up to 35 degrees while maintaining stability and keeping all wheels in contact with the terrain. The wheels are made of aluminum, each 50 centimeters in diameter and equipped with curved grousers (cleats) for enhanced traction on loose and rocky surfaces. The drive actuators consist of 28 DC motors powering the wheels and associated mechanisms, allowing a top speed of 0.14 kilometers per hour (0.09 miles per hour). Navigation and control incorporate , which uses imagery to estimate motion and compensate for wheel slippage on uneven or sandy terrain, improving path accuracy during drives. As of November 2025, the rover's total exceeds 35 kilometers, achieved through drives averaging 100-200 meters per when conditions and power budgets permit extended traversal over science priorities.

Communications and Computing

The Curiosity rover's computing system is built around two redundant Rover Compute Elements (RCEs), each featuring a radiation-hardened processor operating at up to 200 MHz based on the PowerPC 750 architecture. This dual-redundancy design ensures , with the ability to switch between the primary and backup computers in case of failure; the rover has operated on its backup RCE since 2013 following a primary unit anomaly. The flight software runs on the , providing robust control over rover functions including mobility, instrumentation, and data handling. Key software capabilities enable semi-autonomous operations to mitigate the 4-24 minute light-travel delay to Earth. Autonomous hazard avoidance is integrated into the navigation software, utilizing images from front and rear Hazcams to detect and steer clear of obstacles like rocks and slopes during drives. Complementing this, the Autonomous Exploration for Gathering Increased Science (AEGIS) system allows the rover to independently select and analyze science targets, such as rocks for laser spectroscopy with ChemCam, based on onboard image processing. In a 2025 software upgrade, machine learning algorithms were added to enhance rock classification, enabling faster identification of geologically interesting features like sedimentary layers. This upgrade also incorporates enhanced AI for decision-making, allowing multitasking—such as simultaneous driving and instrument operations—and reducing reliance on Earth-based commands by prioritizing high-value activities. Communications rely on a combination of direct-to-Earth and relay pathways to transmit commands and data. The X-band radio system, operating at approximately 8-12 GHz, supports direct links to Earth's Deep Space Network (DSN) antennas, with data rates typically ranging from 0.5 to 32 kbps depending on alignment and distance, though rarely exceeding 2 kbps in practice due to power and geometry constraints. For higher throughput, the UHF radio (around 400 MHz) relays data via Mars orbiters like Mars Reconnaissance Orbiter (MRO) and Mars Odyssey, achieving rates from 2 kbps to 2 Mbps during overflights. The X-band high-gain antenna, a 0.3-meter hexagonal dish mounted on a steerable gimbal, directs signals toward Earth, while low-gain antennas provide backup for low-rate emergency communications; the UHF antenna is fixed for orbiter relays. Data management optimizes limited bandwidth through efficient processing and prioritization. Images and spectra are compressed onboard using the ICER wavelet-based for lossless or near-lossless quality, reducing file sizes significantly compared to uncompressed formats. The rover typically downlinks approximately 250 megabits (about 31 MB) of and engineering data per Martian day (sol), prioritizing raw images, instrument readings, and before archiving excess to its 2 GB . Commands are uplinked via the DSN, often through orbiters for efficiency, with the rover executing sequenced activities autonomously between sessions.

Landing and Entry Systems

The entry vehicle for the Curiosity rover consisted of a 4.5-meter aeroshell enclosing the rover and descent stage, designed to withstand the intense heating of . The employed phenolic-impregnated carbon ablator (PICA), a lightweight material capable of enduring peak temperatures of approximately 2,100°C generated by with the Martian atmosphere during hypersonic entry at speeds exceeding 21,000 km/h. Entry was guided aerodynamically through bank angle modulation of the , leveraging its of about 0.24 to steer toward the target landing site and achieve precision placement within a planned 20 km by 7 km ellipse. Following initial deceleration from atmospheric drag, a disk-gap-band with a nominal of 21.35 meters deployed at approximately Mach 1.7 (around 475 m/s) and about 11 km altitude, further slowing the vehicle to roughly 100 m/s over the next 20 seconds before jettison at 2 km altitude. This , the largest ever used for a Mars mission, featured 80 suspension lines and was mortar-fired into position to ensure stable deceleration in the thin Martian atmosphere. The sky crane system then initiated the powered descent phase, utilizing eight hydrazine-fueled Mars Lander Engines (each providing 400–3,000 N ) arranged in a circular on the descent stage to control the trajectory and reduce velocity from about 100 m/s to . The descent stage hovered at around 20 meters altitude while lowering the 899 kg via a 7.5-meter consisting of tethers and a descent rate limiter, at a constant speed of 0.75 m/s, for approximately 12 seconds until sensors confirmed contact with the surface. The entire entry, descent, and sequence lasted about seven minutes, after which the descent stage flew away to avoid the . Curiosity targeted Gale Crater at coordinates 4.5°S, 137.4°E, selected for its diverse geological features including layered sediments and the central Mount Sharp, which offered opportunities to study Mars' habitability history. The mission achieved a landing accuracy of about 2.4 km from the center of the target ellipse, far exceeding the 20 km requirement through the combined effects of guided entry and powered descent guidance. Backup systems included a terrain-relative navigation capability that was developed and tested on Earth but not activated during flight, relying instead on a radar altimeter in the Terminal Descent Sensor for final altitude and velocity measurements during the powered phase.

Scientific Instruments

Remote Sensing Suite

The Suite on NASA's Curiosity rover comprises instruments mounted on the rover's 2-meter-tall Remote Sensing Mast or its body, enabling non-contact observations of the Martian surface, , and atmosphere for scientific analysis and operational support. These tools provide high-resolution imaging, data, and aids from standoff distances, facilitating site assessment, avoidance, and contextual without physical sampling. The Mast Camera (Mastcam) system features two fixed-focal-length, multispectral stereo cameras mounted on the mast for color imaging and . The left Mastcam has a 34-millimeter for wide-angle views, while the right uses a 100-millimeter for detailed magnification, both delivering 1.6-megapixel resolution images and supporting . These cameras generate panoramic mosaics and support target selection for further investigation, capturing the Martian landscape in true color and multispectral bands to study and atmospheric features. Complementing Mastcam, the Chemistry and Camera (ChemCam) instrument performs remote elemental analysis using laser-induced breakdown spectroscopy (LIBS), vaporizing tiny samples of rocks or soils up to 7 meters away with a pulsed laser to create plasma for spectroscopic identification of elements like silicon and iron. Integrated cameras assist in precise targeting and provide microscopic-scale context images of the ablated spots. By September 2024, ChemCam had executed over one million laser shots, yielding extensive compositional data across Gale Crater. For navigation, the Navigation Cameras (Navcams) consist of two stereo pairs of black-and-white cameras on the mast, each with a 45-degree to enable 3D mapping, obstacle detection, and path planning for safe traversal. These images support autonomous driving and provide wide-area context for operations. The Mars Descent Imager (), a body-mounted color camera with 1.5-megapixel resolution, recorded video during the 2012 landing to characterize the Bradbury Landing site and now images the subsurface, wheel interactions, and local at the end of drives. The mast itself rotates 360 degrees in and tilts up to 90 degrees in , granting a full hemispherical field of regard for mounted instruments like Mastcam, ChemCam, and Navcams to scan horizons, skies, and nearby terrain. Routine daily imaging sequences from this suite deliver essential visual data for mission planning, with images compressed and relayed to via the rover's high-gain antenna for .

Contact and Arm Instruments

The of the Curiosity rover extends 2.1 meters from the rover's body and features five for precise positioning of its tools. Mounted at the end of the is a turret that houses the contact instruments and weighs approximately 30 kg in total, enabling the rover to interact directly with rocks and soil for sample collection and analysis. The achieves positioning precision on the order of millimeters (typically <5 mm), allowing for delicate operations such as brushing surfaces or placing instruments in contact with targets. The (APXS), mounted on the turret, determines the elemental composition of rocks and soils by bombarding samples with alpha particles and X-rays, detecting fluorescent X-rays from elements ranging from sodium (Na) to . To perform measurements, the arm places the APXS head in direct contact with a target, typically requiring 10 to 60 minutes per analysis to accumulate sufficient data for accurate quantification. The Chemistry and Mineralogy (CheMin) instrument uses diffraction to identify in powdered rock and soil samples delivered via the arm, providing insights into past environmental conditions such as presence. Samples are placed into one of CheMin's 10-cup sample carousel inside the rover body, where they are vibrated and exposed to for up to 10 hours over multiple Martian nights to produce diffraction patterns for mineral identification and abundance measurement. The Sample Analysis at Mars (SAM) suite, located within the rover but fed by arm-collected samples, consists of a tunable spectrometer, mass spectrometer, and gas chromatograph to detect organic compounds and analyze isotopic ratios in gases and solids. It processes both atmospheric gases and solid samples heated to around 1,000°C, enabling searches for and its isotopes as potential biosignatures, with sensitivity down to less than 1 part per billion. The Dust Removal Tool (DRT) and Mars Hand Lens Imager (MAHLI), both on the turret, facilitate surface preparation and detailed imaging; the DRT uses a motorized to clear dust from rock targets, while MAHLI captures color microscopic images with a pixel scale of approximately 14 μm/ at its closest focus (about 2 cm), revealing textures and structures at scales finer than a hair (resolving features as small as ~12-14 μm). It can focus from ~2 cm to infinity. For sample acquisition, the turret-mounted collects powdered rock cores up to 5 cm deep by percussing and rotating into targets, producing material that is then transferred via the Collection and Handling for In-Situ Martian Rock Analysis (CHIMRA) device. CHIMRA, also on the turret, scoops, sieves, and portions the powder, separating fine particles smaller than 150 μm for delivery to CheMin and SAM while discarding coarser material.

Environmental and Radiation Detectors

The Rover Environmental Monitoring Station (REMS) is a suite of sensors mounted on the Curiosity rover to monitor key aspects of the Martian atmosphere and surface environment. It includes instruments for measuring , with a range of 1 to 1150 Pa and accuracy of about 20 Pa at end-of-life; air and ground temperatures, spanning 150–300 for air and 100–373 for ground with 5 accuracy; relative humidity, operational over 200–323 with 10% accuracy and typical Martian values below 1%; and direction, capable of detecting horizontal speeds up to 70 m/s with 0.5 m/s resolution and directions from 0° to 360° with 30° resolution, including vertical components up to 10 m/s; and ultraviolet radiation across multiple bands such as 210–380 nm for total dose and 220–275 nm for UVC, with better than 5% accuracy. REMS operates autonomously, collecting at 1 Hz for at least 5 minutes every hour, enabling up to 2 hours of total measurements per Martian , with provisions for extended sessions during notable events. This setup produces hourly environmental profiles and daily reports, which have revealed diurnal pressure variations around 700 Pa, temperature swings from nighttime lows near -130°C to daytime highs up to 20°C, persistent low , and occasional dust-driven gusts exceeding 20 m/s. The Radiation Assessment Detector (RAD) characterizes the high-energy radiation environment on Mars by detecting galactic cosmic rays, solar protons, neutrons, and gamma rays. It measures charged particles such as protons up to ~100 MeV and heavy ions up to ~500 MeV/, alongside neutrals like neutrons in the 10–100 MeV range and gamma rays above 5 MeV, covering an effective particle energy spectrum from approximately 0.3 to 300 MeV. RAD operates continuously, providing ongoing dose measurements that inform human exploration risks; during the cruise phase to Mars, it recorded an average dose rate of 1.8 mSv per day from galactic cosmic rays. On the Martian surface, data indicate an annual radiation exposure equivalent of about 300 mSv, primarily from galactic cosmic rays modulated by the thin atmosphere and solar activity, with daily rates around 0.7 mSv. The Dynamic Albedo of Neutrons (DAN) instrument uses neutron spectroscopy to detect subsurface , indicative of water ice or hydrated minerals, by analyzing neutrons generated from cosmic rays in passive mode or from an onboard pulsed in active mode. It can identify concentrations corresponding to 1–10% water content within the top meter of , with sensitivity down to 0.1% in optimal conditions. DAN performs measurements during rover drives, pulsing the neutron generator approximately every 10 meters to map hydrogen distribution, complemented by passive neutron flux monitoring at standstill; this has yielded profiles showing variable water-equivalent hydrogen levels, such as 1.5–2.5% in Gale Crater soils.

Mission Timeline

Launch and Cruise Phase

The Mars Science Laboratory (MSL) spacecraft, encapsulating the Curiosity rover, launched on November 26, 2011, at 15:02 UTC from Cape Canaveral Air Force Station in Florida aboard an Atlas V 541 rocket developed by United Launch Alliance. The launch successfully injected the 3,893-kilogram spacecraft into a heliocentric transfer orbit, designed as a 36-week trajectory to intersect Mars' orbit at the planet's arrival position. This path accounted for the relative orbital motions of Earth and Mars during the 8.5-month journey, minimizing energy requirements while ensuring timely arrival. Throughout the cruise phase, the spacecraft maintained a spin-stabilized configuration at 2 revolutions per minute for stability, with the cruise stage—equipped with solar arrays, thrusters, and radiators—attached to the aeroshell enclosing the rover and descent systems. Navigation relied on a series of four trajectory correction maneuvers (TCMs) to refine the path and correct for minor injection errors and environmental perturbations, such as solar radiation pressure. The first TCM, the largest, occurred on January 11, 2012, followed by TCM-2 on March 26, TCM-3 on June 26 (the smallest adjustment), and TCM-4 on July 29, collectively ensuring the spacecraft targeted Gale Crater within the required entry corridor. Mission activities focused on system health monitoring via regular telemetry from the cruise stage's X-band radio and periodic engineering tests to verify performance en route. Instrument checkouts included activation of the Radiation Assessment Detector (RAD) on December 6, 2011, which operated continuously to measure galactic cosmic rays and , providing critical data on interplanetary environments. Other checkouts, such as camera calibrations and propulsion envelope tests, confirmed the integrity of rover subsystems without full deployment. The spacecraft traveled approximately 566 million kilometers during this phase, arriving at Mars on August 5, 2012, at 05:17 UTC.

Entry, Descent, and Landing

The entry, descent, and landing (EDL) phase of NASA's Mars Science Laboratory mission began on August 5, 2012, at approximately 10:24 p.m. PDT (05:24 UTC on August 6), when the aeroshell carrying Curiosity pierced the Martian atmosphere at an altitude of about 131 kilometers and an entry velocity of 5.845 km/s (approximately 21,000 km/h). Peak heating on the heat shield reached around 2,100°C roughly 75 seconds after entry, with peak deceleration of 10-11 g occurring shortly thereafter. The guided entry system executed bank angle reversals to steer toward the target in Gale Crater, reducing the landing ellipse from an initial 20 by 25 km to about 7 by 20 km. At approximately 254 seconds into EDL, about 11 km above the surface and at a velocity of roughly 405 m/s (Mach 1.7), a 16-meter supersonic parachute deployed to further decelerate the spacecraft. Following parachute deployment, the heat shield separated at about 8 km altitude and 125 m/s, exposing the radar altimeter, while the backshell with parachute jettisoned at around 1.6 km altitude and 80 m/s. The sky crane descent stage then ignited its eight hydrazine thrusters for powered descent, hovering at approximately 20 meters above the surface before lowering Curiosity on three nylon tethers with the rover's wheels extended in a "landing gear" configuration. Touchdown occurred at 10:31 p.m. PDT on August 5, 2012 (05:31 UTC on August 6), at a vertical velocity of about 0.65 m/s, at the site later named Bradbury Landing (4.5895° S, 137.4417° E) within Gale Crater. Upon sensing contact via its touchdown sensors, the rover commanded the tethers to be cut two seconds later, allowing the descent stage to fly away horizontally and crash approximately 600 meters downrange to avoid hazard. The EDL performance exceeded expectations, with Curiosity landing 2.385 km from the center of the target ellipse, achieving an accuracy of 0.74725 σ within the 99% probability footprint of 18.59 by 6.37 km. All thrusters operated nominally, though minor anomalies included higher-than-expected deceleration during phase (-3.836 σ) and a small affecting fuel use (2.58 σ), with no impact on overall success. Post-landing, the rover's Hazcam instruments captured initial black-and-white images confirming a flat, safe terrain free of large rocks, while the Mastcam and provided color photos and descent video within hours. Rover systems reported 100% health, with full functionality verified shortly after. The EDL sequence unfolded autonomously over seven minutes due to the one-way light-time delay of approximately 14 minutes between Mars and , creating the "seven minutes of terror" for mission controllers who received no real-time updates. Potential risks, such as variable atmospheric density affecting parachute performance, were mitigated through pre-entry modeling and onboard guidance, with no significant dust storms impacting the . Confirmation arrived via a UHF "beep" tone relayed through the Mars Odyssey orbiter 39 seconds after , followed by direct data bursts, enabling rapid assessment of the rover's status.

Surface Exploration to Date

Following its touchdown in Gale Crater on August 6, 2012 (Sol 0), NASA's Curiosity rover began surface operations by exploring the nearby Glenelg area, a scientifically promising region identified pre-landing for its diverse geological features including sedimentary rocks and potential evidence of past water activity. During 2012-2013, the rover traversed approximately 0.5 km through this area, conducting initial surveys with its suite of instruments to characterize the local terrain and outcrops. A key milestone occurred on February 8, 2013 (Sol 182), when Curiosity performed its first drilling operation at the John Klein rock target within the Yellowknife Bay formation, extracting and analyzing powdered mudstone samples to investigate ancient environmental conditions. In 2014, Curiosity initiated its ascent toward , the mission's primary long-term destination at the crater's center, after completing initial objectives in Glenelg. The rover traversed the Kimberley waypoint, reaching it on April 1, 2014 (Sol 589), where it examined layered sandstones indicative of varying depositional environments. Continuing onward, it arrived at the Pahrump Hills on September 19, 2014 (Sol 753), marking the base of after driving nearly 9 km from the landing site; this region featured layers that the rover sampled using its arm-mounted instruments. By late 2014, the rover had begun systematic upward traversal of the mountain's lower slopes, prioritizing scientifically rich waypoints while avoiding hazardous terrain. Subsequent campaigns in the mid-to-late focused on key stratigraphic units along Mount Sharp's flanks. In 2016, Curiosity explored the Murray Buttes region, spending over a month (Sols 1400-1450) imaging layered rock formations and conducting targeted analyses to map the transition from basin floor to mountain base materials. From September 2017 to January 2019 (Sols 1800-2300), the rover ascended Ridge, a prominent hematite-rich feature detected from , confirming the mineral's presence through in-situ and sampling multiple outcrops along its 6-km length. By 2019, Curiosity had completed more than 20 drill sites across these campaigns, delivering samples to its onboard laboratories for detailed characterization. As of 2019, the rover had operated for over 2,500 Martian (reaching Sol 2,488 by August 2019) and driven approximately 21 km in total, with reflecting careful path planning to preserve mobility. Engineering challenges emerged early, including significant wheel wear from sharp, embedded rocks encountered during traverses; damage was first noted on Sol 490 in 2013, progressing to broken grousers on multiple wheels by 2017, which limited traction on two wheels. These issues were mitigated through enhanced route planning and the implementation of Terrain-Relative Control (TRCTL) software on Sol 1,678 in 2016, allowing safer navigation over rugged surfaces. In the years following, Curiosity continued its exploration of Mount Sharp, advancing through additional stratigraphic layers and conducting numerous additional drill campaigns. In late 2025, within the boxwork unit—a region featuring ridge and hollow structures formed by ancient groundwater flow—the rover targeted two specific sites to investigate the transition from wet to dry conditions on Mars. Drilling at 'Valle de la Luna', located in the Monte Grande hollow, occurred around October 2025, followed by a successful drill at 'Nevado Sajama' on the adjacent ridge on Sol 4718 (November 13, 2025). These paired samples allow scientists to compare bedrock compositions across topographic variations, providing insights into the formation processes of the boxwork features and the environmental shifts in Gale Crater. On November 18, 2025 (Sols 4722–4723), from its position on the 'Nevado Sajama' ridge, Curiosity captured a high-definition panorama using its navigation cameras. This composite image, blending views taken at different times of day, showcases the boxwork formations and highlights their resistance to erosion, indicative of past groundwater activity.

Recent Operations and Upgrades

In the early 2020s, Curiosity continued its ascent of , focusing on the Gediz Vallis channel from 2021 to 2023 to investigate ancient fan deposits formed by river flows. After multiple attempts, the rover reached Gediz Vallis Ridge in August 2023 (sol 3923), enabling detailed mapping of the surrounding terrain. By late 2023, it had accessed sulfate-rich layers within the channel, using its instruments to sample and analyze these deposits indicative of past watery environments. Following its departure from Gediz Vallis in November 2024, Curiosity advanced to fresher terrain higher on , including a notable drill operation at the "Altadena" site on sol 4569 (June 2025) to collect samples for composition analysis. In October 2025, the rover conducted targeted observations at additional waypoints, capturing high-resolution imagery of layered outcrops to support ongoing geological surveys. In November 2025, the rover executed its 44th drill operation in the boxwork unit, targeting for analysis of potential microbial indicators. On November 18, 2025 (Sols 4722 and 4723), NASA's Curiosity rover captured a high-resolution panoramic image from high on the slopes of Mount Sharp inside Gale Crater using its black-and-white navigation cameras. The image is a composite that combines photos taken at different times of day—4:15 p.m. local Mars time on Sol 4722 and 8:20 a.m. local Mars time on Sol 4723—to show changing light across ancient water-shaped terrain in the boxwork formation region. This panorama highlights the rover's ability to transmit high-quality images from approximately 225 million miles (362 million kilometers) away. To enhance operational efficiency amid declining power output, mission engineers uploaded software upgrades in August 2025, incorporating AI-driven for improved targeting of scientific observations and multitasking capabilities that reduce energy demands from the (MMRTG). These improvements allow the rover to perform multiple instrument activities simultaneously while conserving power, extending its productive lifespan. As of November 16, 2025, Curiosity has operated for 4,721 sols, traveling approximately 36 kilometers across Gale Crater while steadily climbing Mount Sharp. Key challenges include the ongoing decay of the MMRTG's plutonium fuel, which has reduced power output by about 10% since landing, managed through optimized scheduling and the recent software enhancements. Communications have benefited from the expanded Mars Relay Network since Perseverance's arrival in 2021, providing additional orbital relay opportunities via shared assets.

Key Scientific Findings

Evidence of Past Habitability

Curiosity's investigations in Gale Crater have revealed substantial evidence for ancient aqueous environments conducive to microbial life, primarily through the detection of hydrated minerals and organic compounds preserved in sedimentary rocks. In 2013, the rover's analysis of the Yellowknife Bay formation, particularly the Sheepbed member mudstone, identified smectite clay minerals via X-ray diffraction, indicating a habitable lakebed environment with neutral to mildly alkaline waters that persisted for potentially tens of millions of years. These findings were complemented by subsequent discoveries of abundant hydrated minerals, such as phyllosilicates, throughout Gale Crater's stratigraphic layers, confirming a long history of persistent lacustrine conditions that could have supported chemical energy gradients essential for life. The presence of organic molecules further bolsters the case for past , as these carbon-based compounds are key building blocks for life. In 2014, the Sample Analysis at Mars (SAM) instrument detected and other chlorinated hydrocarbons in drilled samples from the Sheepbed , marking the first definitive identification of organics on Mars and suggesting preservation in a wet, reducing environment. More recently, in March 2025, SAM identified the largest organic molecules yet found on the planet—long-chain alkanes with up to 12 carbon atoms—in a sample from the Gediz Vallis ridge, potentially derived from ancient fatty acids and indicative of a habitable setting capable of sustaining complex chemistry. These detections highlight Crater's role as a repository for refractory organics that could have originated from abiotic or biological processes. Carbonate minerals provide additional clues to the chemistry of ancient Martian waters. In April 2025, Curiosity identified iron-rich siderite deposits within an 89-meter stratigraphic section of Mount Sharp, formed approximately 3.5 billion years ago in waters of near-neutral pH, which would have been far more hospitable to potential microbes than the acidic conditions previously inferred for early Mars. These carbonates, interbedded with iron oxyhydroxides, suggest a dynamic carbon cycle involving precipitation from bicarbonate-rich fluids, offering a stable geochemical niche for life. Specific stratigraphic units in Gale Crater exemplify zones of enhanced habitability. The Gillespie Lake member, explored around 2016, contains fine-grained lake sediments with sedimentary structures resembling microbial mats, dated to less than 3.7 billion years old and deposited in a shallow playa lake setting with fluctuating water levels that could foster microbial communities. Moreover, perchlorates detected throughout the crater serve as potential energy sources for microbes, acting as electron acceptors in anaerobic respiration similar to processes observed in Earth extremophiles. Intriguing atmospheric data from SAM's Tunable Laser Spectrometer (TLS) add to the narrative through observations of . Measurements over multiple Martian years show seasonal variations in methane levels, with a background of about 0.4 by volume (ppbv) rising to spikes as high as 30 ppbv, potentially linked to subsurface geological or biogenic sources that warrant further investigation for biological implications. These fluctuations, observed in Crater's atmosphere, align with a past environment where methane could have been produced by in wet sediments.

Geological and Mineralogical Discoveries

Curiosity's exploration of Gale Crater's has revealed a layered spanning over 3 billion years, with lower sections dominated by fine-grained mudstones indicative of ancient lacustrine environments and upper layers transitioning to coarser sandstones suggesting fluvial and deltaic deposition from rivers feeding into lakes. These sedimentary sequences, part of the Murray and Carolyn Shoemaker formations, record prolonged episodes of water activity during the Hesperian period, followed by erosion that exhumed the strata over billions of years. The shift from mudstones to interbedded sandstones in regions like Glen Torridon highlights environmental transitions from low-energy lake settings to higher-energy river systems, providing a vertical record of Mars' evolving . At Ridge, a prominent -rich feature traversed in 2018, Curiosity identified coarse-grained crystals formed through diagenetic alteration by acidic that permeated fractures in the underlying Murray formation mudstones. The presence of well-crystalline akaganeite and jarosite in drill samples from sites like Stoer and Rock Hall indicates acid-saline fluids with pH levels around 1.5–2, likely sourced from the oxidation of iron sulfides and capable of mobilizing iron to form the observed concentrations up to 15 wt.%. Fractured along the ridge, exposed by differential erosion and possibly enhanced by ancient impacts, facilitated this fluid infiltration, cementing the sediments and contributing to the ridge's resistance to . The rover's Chemistry and Mineralogy (CheMin) instrument has characterized a diverse mineral assemblage in Gale Crater rocks, including abundant feldspars, pyroxenes, and olivines consistent with basaltic parent materials altered by surface processes. In sulfate-rich layers encountered in 2023 along the Gediz Vallis ridge, CheMin and other analyses detected elevated concentrations of these igneous minerals alongside evaporitic sulfates, remnants of ancient lakes that dried into salty deposits during Mars' transition to a drier . A notable 2024 discovery involved pure elemental crystals exposed when Curiosity's wheel crushed a rock nicknamed "" in a -abundant region, marking the first such finding on Mars and suggesting rare formation processes beyond typical salts. These yellow crystals, observed via Mastcam imaging and confirmed by data, likely originated from localized hydrothermal or volcanic activity in an environment where water evaporation concentrated compounds. Erosion on Mount Sharp continues to shape the landscape, with wind-sculpted yardangs in the upper Yardang Unit forming streamlined ridges from soft sedimentary layers, as imaged by Curiosity in late 2024. Boulder tracks visible in the crater's slopes indicate recent geomorphic activity, where wind or seismic events displace rocks, exposing fresher surfaces and highlighting ongoing aeolian processes in Gale Crater. In 2025, Curiosity began investigating boxwork formations—networks of pronounced ridges and hollows—spanning miles across layers on , using the Mars Hand Lens Imager (MAHLI), Mastcam, ChemCam (), and Alpha Particle X-ray Spectrometer () to document rock textures and chemistry. Observations in September 2025 revealed smoother bedrock on ridges contrasting with nodular, hollow-edged rocks, suggesting formation through fluid cementation and differential erosion that may indicate past subsurface water flows. These structures provide insights into Mars' geological history and potential by revealing evidence of ancient fluid activity.

Atmospheric and Climate Data

The Martian atmosphere, as measured by the Sample Analysis at Mars (SAM) instrument aboard the Curiosity rover, consists primarily of 95.1% carbon dioxide, 2.59% molecular nitrogen, and 1.94% argon by volume, with trace amounts of oxygen at approximately 0.16%. These measurements, taken at Gale Crater over multiple Martian years, reveal seasonal variations in composition, including fluctuations in oxygen levels driven by photochemical reactions and atmospheric dynamics. The Rover Environmental Monitoring Station (REMS) has corroborated the presence of variable trace oxygen through indirect indicators like pressure and humidity correlations, highlighting the dynamic nature of the thin atmosphere. Curiosity's REMS suite has documented extreme weather patterns, including diurnal temperature swings exceeding 100°C, with surface air temperatures ranging from as low as -130°C at night to above 20°C during the day in summer sols. Observations from the rover's cameras have captured dust devils, transient vortices that lift fine particles and contribute to atmospheric loading, occurring predominantly in the afternoon when solar heating drives . During the global of Mars Year 34 in 2018, REMS recorded significant pressure drops, with diurnal amplitudes increasing to around 48 Pa at the storm's peak due to enhanced and dust-induced warming aloft. Isotopic analyses by SAM provide insights into Mars' climate history, revealing a deuterium-to-hydrogen (D/H) in atmospheric approximately six times that of Earth's oceans, signaling substantial loss of lighter through non-thermal escape processes over billions of years. This enrichment, measured in water desorbed from soil samples, indicates that ancient Mars likely had a wetter atmosphere that progressively thinned due to stripping. Similarly, argon isotope ratios, with a ^{36}Ar/^{38}Ar value about four times lower than expected for a primordial atmosphere, demonstrate preferential escape of lighter isotopes, supporting models of early atmospheric loss totaling up to 66% of the planet's initial volatile inventory. The Radiation Assessment Detector (RAD) on has quantified the environment, showing that galactic cosmic ray (GCR) flux increases at higher elevations due to reduced atmospheric shielding; as the rover ascends , overhead column density decreases from about 23 g/cm² at the landing site to lower values, elevating GCR dose rates by up to 20-30%. During the cruise phase en route to Mars, RAD detected multiple solar particle events, including intense flares that doubled levels and provided calibration data for surface measurements. On the surface since , RAD has recorded baseline GCR doses of 180-225 μGy/day, modulated by solar activity and local . REMS observations of the reveal episodic frost formation in the mornings, particularly during colder seasons, when ground temperatures drop below the frost point and relative reaches up to 75%, though absolute remains below 0.5% due to the sparse atmosphere. These events, inferred from temperature and profiles, indicate transient ice deposition on the surface before sublimation under diurnal heating. Complementing this, the Dynamic of Neutrons (DAN) instrument has mapped subsurface -equivalent hydrogen (WEH) content along the rover's traverse, detecting levels up to 4% in hydrated minerals and possible ice-rich layers within the top meter of , varying spatially with geological context.

Legacy and Impact

Cultural and Public Engagement

The Curiosity rover's entry, descent, and landing sequence captured global attention through NASA's "7 Minutes of Terror" video, a computer-animated depiction released in June 2012 that amassed over two million views on YouTube by year's end, highlighting the high-stakes engineering challenges of the mission. The live broadcast of the August 2012 landing drew more than 3.2 million viewers via online streams, surpassing primetime cable news audiences and fostering widespread public excitement about Mars exploration. NASA engaged the public through interactive tools, including the "Send Your Name to Mars" campaign launched in 2011, which collected over 1.2 million names etched onto silicon chips carried aboard the rover, allowing participants worldwide to symbolically join the mission. Apps and web-based platforms further enabled real-time tracking, such as the Experience Curiosity tool and NASA's Eyes visualization suite, which let users follow the rover's path, view sol-by-sol data, and explore Gale Crater in 3D using actual mission imagery. Curiosity's mission inspired cultural depictions of Mars exploration, notably in the 2015 film The Martian, which dramatized rover operations and survival scenarios drawing from 's real-world robotic precedents, while TV broadcasts of mission milestones reached audiences through educational programming. Public reactions on often highlighted the rover's damage from rugged , with images of the worn aluminum treads sparking discussions on mission endurance since 2013. Educational outreach via NASA's provided classroom resources, including lesson plans on rover design, Mars geology, and engineering challenges, integrated into STEM curricula for K-12 students. Student competitions, such as the 2009 essay contest that named the rover "" after a sixth-grader's submission, encouraged young participants to engage with . Social media amplified NASA's outreach, with the @MarsCuriosity account amassing over four million followers by 2019, sharing first-person updates from the rover's perspective to humanize the mission. Additionally, NASA released free 3D-printable models of Curiosity in 2015, enabling museums and educators to create tangible replicas for exhibits and hands-on learning about interplanetary .

Technological Innovations

The sky crane landing system marked a pivotal advancement in planetary entry, descent, and (EDL) technology, enabling the first soft touchdown of a heavy weighing approximately 899 kilograms on Mars. Unlike prior or bounce-and-roll methods, the sky crane employed a powered descent vehicle that hovered above the surface while lowering the via tethers from a rocket-powered "jetpack," which then detached and crashed away to avoid contamination. This minimized landing footprint and shock, allowing to target more precise, scientifically rich sites with reduced risk, and demonstrated scalability for future missions carrying larger payloads up to several tons. Curiosity's Multi-Mission Radioisotope Thermoelectric Generator (MMRTG) revived systems for Mars surface exploration after a hiatus of over three decades since the Viking landers in , which had used similar radioisotope sources. The MMRTG harnesses the heat from the decay of to generate approximately 110 watts of electrical power continuously, independent of solar illumination or atmospheric dust accumulation that limited earlier solar-dependent rovers like Spirit and Opportunity during global dust storms. This reliable, long-duration energy supply—expected to last at least —supported extended operations across varied terrains and seasons, powering instruments and mobility without the mass penalties of large solar arrays or batteries. Advancements in onboard software enhanced Curiosity's operational efficiency, with the (AEGIS) system enabling independent target selection for the Chemistry and Camera (ChemCam) instrument by analyzing spectral data and images to prioritize features like outcrops. Integrated with , which processes stereo camera imagery to estimate the rover's position and slippage in real-time, these tools allowed safe traversal of uneven, rock-strewn terrain without constant intervention, improving drive accuracy over slopes up to 30 degrees. In 2025, AI-driven upgrades to the autonomy suite optimized energy allocation and planning sequences through streamlined command cycles and fewer communication passes. The Sample Acquisition, Processing, and Handling (SA/SPaH) subsystem, featuring the Collection and Handling for In-Situ Martian Rock Analysis (CHIMRA) device and the Mars Hand Lens Imager-Microscope Camera (MAHLI), introduced for geological sample manipulation on another planet. CHIMRA, a tunable and portioner mounted on the , collects powdered rock samples via percussion , sieves them into fine fractions (150–2,000 micrometers), and delivers portions to onboard analyzers like the Sample Analysis at Mars (SAM) instrument, while also demonstrating caching by storing excess material in its chambers. Complementing this, MAHLI provided close-up at magnifications up to 14.4 times, verifying sample and texture before processing. These capabilities served as a technological precursor to sample return architectures, validating end-to-end handling of Martian for potential Earth-based analysis. Curiosity's rocker-bogie suspension system, an evolution of designs from the Mars Exploration Rovers, demonstrated exceptional durability by enabling over 35 kilometers of travel across abrasive, sharp-rock-dominated terrains like the Gale Crater floor, as of August 2025, where embedded basalt protrusions caused progressive wheel punctures after initial drives. The six-wheel configuration, with passive rocker links and bogie pivots distributing up to 35 kilograms per wheel, maintained platform stability over obstacles up to 60 centimeters high while absorbing impacts that would destabilize rigid frames. This real-world performance, despite wear exceeding design expectations, informed refinements in wheel materials—such as thicker aluminum treads with grousers—and suspension tuning for later rovers, emphasizing trade-offs between traction, mass, and longevity in extraterrestrial regolith.

Influence on Future Mars Exploration

Curiosity's pioneering use of the Collection and Handling for In-Situ and Sample Analysis (CHIMRA) instrument to drill, sieve, and portion powdered rock samples demonstrated reliable autonomous sample processing on Mars, directly informing the engineering of Perseverance's adaptive caching assembly for coring and sealing intact rock samples. This capability paved the way for Perseverance, which shares Curiosity's chassis, mobility system, and nuclear power source while adding sample tubes to collect up to 43 cores for potential return to Earth. Launched in 2020 and landing in Jezero Crater in 2021, Perseverance's mission is a foundational step toward the Mars Sample Return campaign, now targeted for sample retrieval in the 2030s following architecture refinements to address cost and timeline challenges. Data from Curiosity's Radiation Assessment Detector (RAD) during its 253-day cruise to Mars and subsequent surface operations quantified galactic cosmic ray and solar particle exposure, revealing dose rates of about 1.8 millisieverts per day in transit—exceeding NASA's annual limit for radiation workers and informing shielding requirements for crewed missions. These measurements have shaped radiation risk models for the Artemis program's deep-space phases, highlighting the need for enhanced protection against chronic exposure during lunar-to-Mars trajectories. Additionally, Curiosity's detection of organic molecules and evidence of ancient habitable environments in Gale Crater validated the scientific rationale for selecting Jezero Crater—a site with a preserved delta indicative of past water flows and potential biosignatures—for Perseverance's landing, as analogous geological features suggested comparable prospects for life-related evidence. The laser-induced breakdown spectroscopy (LIBS) technique employed by Curiosity's Chemistry and Camera (ChemCam) instrument has been leveraged in preparatory studies for the European Space Agency's Rosalind Franklin rover, with ChemCam's spectral data from Martian rocks used to calibrate and simulate instruments like the Raman Laser Spectrometer for subsurface organic detection during the delayed 2028 ExoMars mission. Curiosity's operational longevity, exceeding 13 Earth years as of 2025 through adaptive power management and software upgrades, exemplifies the viability of extended rover missions in harsh environments, a model reflected in the design goals for China's Tianwen-1 Zhurong rover, which achieved 347 Martian days of surface operations after landing in 2021 before entering hibernation. This endurance has similarly guided the development of NASA's Volatiles Investigating Polar Exploration Rover (VIPER), a solar-powered lunar mission slated for late 2027 deployment to the Moon's south pole via Blue Origin, emphasizing robust autonomy for multi-month traverses in extreme cold. As of November 2025, after over 4,720 Martian sols, Curiosity continues active operations, focusing on boxwork mineral formations on Mount Sharp to probe ancient subsurface water flows and potential microbial persistence. Curiosity's transformative discoveries have reinforced the emphasis on Mars as a priority in NASA's portfolio, aligning with the 2023-2032 Decadal Survey's flagship recommendation for Mars Sample Return as a high-impact endeavor to advance and geosciences, while advocating for sustained robotic precursors to human exploration. The mission's success amid budget constraints helped justify increased allocations for elements in subsequent fiscal years, including extensions for Curiosity itself and development of Perseverance, contributing to a stabilized funding trajectory despite overall Science Mission Directorate pressures.

References

  1. https://science.nasa.gov/mission/msl-curiosity/
  2. https://www.nasa.gov/missions/mars-science-laboratory/curiosity-rover/marking-13-years-on-mars-nasas-curiosity-picks-up-new-skills/
  3. https://science.nasa.gov/resource/mars-rover-power/
  4. https://science.nasa.gov/mission/msl-curiosity/science-instruments/
  5. https://www.space.com/space-exploration/mars-rovers/nasas-curiosity-rover-sends-stunning-new-panorama-from-high-on-mars-mount-sharp
  6. https://science.nasa.gov/mission/msl-curiosity/science/
  7. https://www.jpl.nasa.gov/news/curiosity-rover-just-hours-from-mars-landing/
  8. https://www.jpl.nasa.gov/news/nasa-selects-investigations-for-the-mars-science-laboratory/
  9. https://oig.nasa.gov/docs/IG-11-019.pdf
  10. https://www.jpl.nasa.gov/videos/building-curiosity-rover-shakedown/
  11. https://ntrs.nasa.gov/api/citations/20090007730/downloads/20090007730.pdf
  12. https://cnes.fr/en/projects/chemcam
  13. https://spacenews.com/nasa-announces-mars-science-lab-mission-launch-contract/
  14. https://science.nasa.gov/photojournal/weather-sensors-from-spain-on-mars-rover-curiosity/
  15. https://eos.org/research-spotlights/curiosity-sends-curious-water-data-from-mars
  16. https://www.planetary.org/space-policy/cost-of-msl-curiosity
  17. https://www.jpl.nasa.gov/news/press_kits/MSLLanding.pdf
  18. https://www-robotics.jpl.nasa.gov/media/documents/ROB-20-0040_R3.pdf
  19. https://mars.nasa.gov/internal_resources/788/
  20. https://llis.nasa.gov/lesson/11201
  21. https://mars.nasa.gov/multimedia/interactives/learncuriosity/index-2.html
  22. https://www-robotics.jpl.nasa.gov/what-we-do/flight-projects/mars-science-laboratory/surface-system-software-and-rover-navigation/
  23. https://science.nasa.gov/planetary-science/programs/radioisotope-power-systems/faq/
  24. https://www.energy.gov/ne/articles/powering-curiosity-multi-mission-radioisotope-thermoelectric-generators
  25. https://www.hou.usra.edu/meetings/leag2014/pdf/3002.pdf
  26. https://eepower.com/news/curiosity-rover-features-unique-hybrid-power-system/
  27. https://phys.org/news/2025-08-years-mars-nasa-curiosity-skills.html
  28. https://ijisrt.com/wp-content/uploads/2017/05/Design-of-Rocker-Bogie-Mechanism-1.pdf
  29. https://www.planetary.org/space-images/diagram-of-a-curiosity-wheel
  30. https://www.maxongroup.net.au/medias/sys_master/root/8846392229918/maxon-missions-to-Mars-overview.pdf
  31. https://www-robotics.jpl.nasa.gov/media/documents/visual_odometry_thinking_while_driving_final.pdf
  32. https://www.baesystems.com/en-us/article/bae-systems-hardware-lands-on-mars-aboard-curiosity-rover
  33. https://science.nasa.gov/resource/autonomous-selection-of-a-rovers-laser-target-on-mars/
  34. https://descanso.jpl.nasa.gov/monograph/series13/DeepCommo_Chapter7--141030.pdf
  35. https://tda.jpl.nasa.gov/progress_report/42-156/156I.pdf
  36. https://an.rsl.wustl.edu/help/Content/About%20the%20mission/MSL/MSL%20instrument%20host.htm
  37. https://science.nasa.gov/resource/communicating-with-curiosity-2/
  38. https://phys.org/news/2009-07-shield-readied-mars-rover.html
  39. https://www.space.com/16878-mars-rover-landing-sky-crane-guide.html
  40. https://ntrs.nasa.gov/citations/20130012763
  41. https://science.nasa.gov/resource/mars-science-laboratory-parachute-artists-concept/
  42. https://science.nasa.gov/planetary-science/programs/mars-exploration/mission-timeline/how-we-land-on-mars/
  43. https://marsoweb.nas.nasa.gov/landingsites/msl/topsites/gale_crater/
  44. https://www.cnn.com/2012/08/10/us/mars-curiosity
  45. https://www.jpl.nasa.gov/news/heres-how-curiositys-sky-crane-changed-the-way-nasa-explores-mars/
  46. https://pubs.usgs.gov/publication/70190518
  47. https://pubs.usgs.gov/publication/70044375
  48. https://www.lanl.gov/media/news/0905-chemcam
  49. https://www.jpl.nasa.gov/images/pia15951-comparison-of-curiosity-camera-fields-of-view/
  50. https://www.msss.com/all_projects/msl-mardi.php
  51. https://pmc.ncbi.nlm.nih.gov/articles/PMC5652233/
  52. https://www.jpl.nasa.gov/news/strong-robotic-arm-extends-from-next-mars-rover/
  53. https://www-robotics.jpl.nasa.gov/media/documents/rankin-2540-arm-kinematics-2021-0102.pdf
  54. https://pds.mcp.nasa.gov/portal/instruments/urn--nasa--pds--context--instrument--apxs---msl/data
  55. https://www.jpl.nasa.gov/news/advanced-nasa-instrument-gets-close-up-on-mars-rocks/
  56. https://www.nasa.gov/missions/mars-science-laboratory/curiosity-rover/what-is-the-chemistry-and-mineralogy-instrument/
  57. https://science.gsfc.nasa.gov/699/projects/347
  58. https://www.jpl.nasa.gov/news/how-nasa-curiosity-instrument-made-first-detection-of-organic-matter-on-mars/
  59. https://www.jpl.nasa.gov/news/mars-rover-curiosity-arm-tests-nearly-complete/
  60. https://www-robotics.jpl.nasa.gov/media/documents/1-s2.0-S0019103520302657-main_look_back_drilling_on_curiosity_part_ii.pdf
  61. https://ntrs.nasa.gov/api/citations/20100021914/downloads/20100021914.pdf
  62. http://cab.inta-csic.es/rems/wp-content/uploads/2013/04/2008_LPSC_1647.pdf
  63. http://cab.inta-csic.es/rems/en/intrument-description/wind-sensor/
  64. https://wrmiss.org/workshops/fifteenth/Hassler.pdf
  65. https://science.[nasa](/page/NASA).gov/mission/msl-curiosity/science-instruments/
  66. https://www.jpl.nasa.gov/news/data-from-nasa-rovers-voyage-to-mars-aids-planning/
  67. https://mars.nasa.gov/msl/spacecraft/instruments/dan/
  68. https://www.jpl.nasa.gov/news/nasa-launches-most-capable-and-robust-rover-to-mars/
  69. https://www.jpl.nasa.gov/missions/mars-science-laboratory-curiosity-rover-msl/
  70. https://ntrs.nasa.gov/api/citations/20130013986/downloads/20130013986.pdf
  71. https://www.jpl.nasa.gov/news/mars-bound-nasa-craft-adjusts-path-tests-instruments/
  72. https://www.jpl.nasa.gov/news/curiosity-rover-on-track-for-early-august-landing/
  73. https://www.jpl.nasa.gov/news/nasa-mars-bound-rover-begins-research-in-space/
  74. https://www.jpl.nasa.gov/news/curiosity-rover-on-track-for-early-august-landing-2/
  75. https://ntrs.nasa.gov/api/citations/20130011617/downloads/20130011617.pdf
  76. https://science.nasa.gov/resource/challenges-of-getting-to-mars-curiositys-seven-minutes-of-terror/
  77. https://science.nasa.gov/resource/curiositys-first-sample-drilling/
  78. https://www.jpl.nasa.gov/images/pia18607-curiosity-mars-rovers-route-from-landing-to-pahrump-hills/
  79. https://www.jpl.nasa.gov/news/mars-rover-views-spectacular-layered-rock-formations/
  80. https://www.jpl.nasa.gov/news/curiosity-says-farewell-to-mars-vera-rubin-ridge/
  81. https://www.planetary.org/articles/curiosity-update-sols-2313-2387
  82. https://spaceflightnow.com/2017/03/28/curiosity-rover-shows-new-signs-of-wheel-wear/
  83. https://science.nasa.gov/blog/curiosity-blog-sols-4709-4715-drilling-high-and-low-in-the-boxwork-unit/
  84. https://science.nasa.gov/blog/curiosity-blog-sols-4716-4722-drilling-success-at-nevado-sajama/
  85. https://www.nasa.gov/image-article/curiosity-sends-holiday-postcard-from-mars/
  86. https://www.americaspace.com/2023/08/06/curiosity-celebrates-11-years-of-discovery-on-mars/
  87. https://science.nasa.gov/blog/curiosity-blog-sols-4568-4569-a-close-look-at-the-altadena-drill-hole-and-tailings/
  88. https://images.nasa.gov/details/PIA26680
  89. https://science.nasa.gov/blog/curiosity-blog-sols-4689-4694-drill-in-the-boxwork-unit-is-go/
  90. https://scitechdaily.com/nasas-curiosity-mars-rover-just-got-a-big-brain-upgrade/
  91. https://science.nasa.gov/mission/msl-curiosity/location-map/
  92. https://science.nasa.gov/mars/mars-relay-network/
  93. https://ntrs.nasa.gov/api/citations/20140003858/downloads/20140003858.pdf
  94. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JE007185
  95. https://phys.org/news/2014-12-curiosity-rover-mars.html
  96. https://www.pnas.org/doi/10.1073/pnas.2420580122
  97. https://www.science.org/doi/10.1126/science.ado9966
  98. https://www.jpl.nasa.gov/news/nasas-curiosity-rover-may-have-solved-mars-missing-carbonate-mystery/
  99. https://pubmed.ncbi.nlm.nih.gov/25495393/
  100. https://pmc.ncbi.nlm.nih.gov/articles/PMC5500590/
  101. https://pubmed.ncbi.nlm.nih.gov/29880682/
  102. https://www.sciencedirect.com/science/article/abs/pii/S0012821X20306117
  103. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029/2019JE006306
  104. https://ntrs.nasa.gov/api/citations/20205001823/downloads/Rampe_etal_VRR_mineralogy_main_text_revised_tracked_changes_accepted.docx.pdf
  105. https://science.nasa.gov/resource/first-chemin-results/
  106. https://www.jpl.nasa.gov/news/nasas-curiosity-finds-surprise-clues-to-mars-watery-past/
  107. https://science.nasa.gov/resource/curiosity-views-sulfur-crystals-within-a-crushed-rock/
  108. https://www.jpl.nasa.gov/images/pia26472-curiosity-views-the-yardang-unit/
  109. https://www.jpl.nasa.gov/news/mars-orbiter-images-rover-and-tracks-in-gale-crater/
  110. https://science.nasa.gov/blog/curiosity-blog-sols-4649-4654-ridges-hollows-and-nodules-oh-my/
  111. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/2019je006175
  112. https://www.jpl.nasa.gov/images/pia20600-seasonal-cycles-in-curiositys-first-two-martian-years/
  113. https://science.nasa.gov/resource/curiosity-observes-whirlwinds-carrying-martian-dust/
  114. https://agupubs.onlinelibrary.wiley.com/doi/full/10.1029%252F2019JE005985
  115. https://science.nasa.gov/resource/atmospheric-loss-on-mars/
  116. https://www.science.org/doi/10.1126/science.aai7721
  117. https://agupubs.onlinelibrary.wiley.com/doi/abs/10.1002/2013GL057763
  118. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2018GL077760
  119. https://www.nasa.gov/image-article/curiosity-radiation-assessment-device-rad/
  120. https://www.sciencedirect.com/science/article/pii/S0019103515005540
  121. https://agupubs.onlinelibrary.wiley.com/doi/10.1029/2022JE007327
  122. https://www.nytimes.com/2013/01/01/science/science-topics-go-viral-on-social-media.html
  123. https://www.theverge.com/2012/8/8/3228405/ustream-mars-landing-numbers
  124. https://www.cnet.com/tech/gaming/viewers-opted-for-the-web-over-tv-to-watch-curiositys-landing/
  125. https://science.nasa.gov/resource/send-your-name-to-mars-chips-location/
  126. https://eyes.nasa.gov/curiosity/
  127. https://science.nasa.gov/eyes/
  128. https://www.jpl.nasa.gov/news/jpls-role-in-making-the-martian-a-reality/
  129. https://www.space.com/nasa-mars-rover-curiosity-wheel-damage-photos
  130. https://www.jpl.nasa.gov/edu/resources/
  131. https://www.jpl.nasa.gov/edu/news/nasa-essay-contest-winner-naming-curiosity-mars-rover-changed-my-life/
  132. https://www.ragan.com/5-tips-from-nasas-stellar-social-media-presence/
  133. https://3dprint.com/89508/nasa-3d-print-curiosity-rover/
  134. https://www.nasa.gov/missions/mars-science-laboratory/curiosity-rover/heres-how-curiositys-sky-crane-changed-the-way-nasa-explores-mars/
  135. https://ntrs.nasa.gov/api/citations/20160001769/downloads/20160001769.pdf
  136. https://ai.jpl.nasa.gov/public/documents/papers/estlin-acmtist2014-aegis.pdf
  137. https://ntrs.nasa.gov/api/citations/20100021927/downloads/20100021927.pdf
  138. https://www-robotics.jpl.nasa.gov/media/documents/fmwi-rankin-2022-0225-final.pdf
  139. https://www.planetary.org/space-missions/perseverance
  140. https://appel.nasa.gov/2025/01/29/nasa-exploring-mars-sample-return-architecture/
  141. https://science.nasa.gov/science-research/science-enabling-technology/technology-highlights/exploring-how-radiation-exposure-will-affect-life-forms-on-the-way-to-mars/
  142. https://www.nature.com/articles/s41586-024-07927-7
  143. https://news.mit.edu/2024/study-mars-jezero-crater-rocks-contain-signs-of-water-0814
  144. https://www.sciencedirect.com/science/article/pii/S0003267021008291
  145. https://science.nasa.gov/mission/viper/
  146. https://www.planetary.org/articles/planetary-decadal-two-years-in
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