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2011 in spaceflight

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2011 in spaceflight

The year 2011 saw a number of significant events in spaceflight, including the retirement of NASA's Space Shuttle after its final flight in July 2011, and the launch of China's first space station module, Tiangong-1, in September. A total of 84 orbital launches were conducted over the course of the year, of which 78 were successful. Russia, China and the United States conducted the majority of the year's orbital launches, with 35, 19 and 18 launches respectively; 2011 marked the first year that China conducted more successful launches than the United States. Seven crewed missions were launched into orbit during 2011, carrying a total of 28 astronauts to the International Space Station. Additionally, the Zenit-3F and Long March 2F/G carrier rockets made their maiden flights in 2011, while the Delta II Heavy made its last.

A total of 84 orbital launches were attempted in 2011, with 78 being reported as successful; 80 launches reached orbit. 35 launches were conducted using Russian and former Soviet rockets, whilst China launched 19 rockets, and the United States launched 18. Europe conducted five launches, India and Japan launched three rockets each, and Iran conducted one launch.

Seven crewed spaceflights – four Soyuz and three Space Shuttle missions – were launched in 2011, carrying a total of 28 astronauts and cosmonauts into orbit. At the beginning of the year, the Expedition 26 crew was aboard the International Space Station (ISS). The first crewed flight of 2011 was STS-133, the final flight of the Space Shuttle Discovery, which launched from the Kennedy Space Center on 24 February. STS-133 carried Leonardo, the final American pressurised module of the ISS, for installation. Discovery returned to Earth on 9 March.

On 16 March, Expedition 27 began aboard the ISS with the departure of the Soyuz TMA-01M spacecraft, which had been docked since October 2010. On 4 April, Soyuz TMA-21 launched to the space station, delivering a further three crewmembers. On 16 May, Space Shuttle Space Shuttle Endeavour launched to the station on its final mission, STS-134, delivering and installing the Alpha Magnetic Spectrometer, before returning to Earth on 1 June. Expedition 28 began aboard the ISS on 23 May with the departure of Soyuz TMA-20, which had been launched in December 2010, and landed in the early morning of 24 May. Three more crewmembers were launched to the space station aboard Soyuz TMA-02M on 7 June.

The final Space Shuttle mission, STS-135, began on 8 July with the launch of Space Shuttle Atlantis, carrying supplies for the ISS aboard the Raffaello Multi-Purpose Logistics Module (MPLM). After resupplying the space station, Atlantis returned to Earth, landing at Kennedy Space Center's Shuttle Landing Facility at 09:57 UTC on 21 July, and concluding thirty years of Space Shuttle operations. Two days before landing, Atlantis deployed PSSC-2, the last satellite to be launched from a Space Shuttle.

On 29 September, China launched its first space station module, Tiangong-1, which was placed into orbit by a Long March 2F/G carrier rocket flying from the Jiuquan Satellite Launch Centre. Although no crewed missions to Tiangong-1 were conducted in 2011, the uncrewed Shenzhou 8 spacecraft, which was launched on 31 October, docked twice with the module to test its systems in preparation for a successful 2012 crewed docking.

ISS Expedition 28 ended, and Expedition 29 began, with the undocking of Soyuz TMA-21 on 16 September. The launch of Soyuz TMA-22 did not take place until 14 November, having been delayed by reliability concerns surrounding the Soyuz rocket after an uncrewed launch failure in August. A week later, Soyuz TMA-02M undocked, beginning Expedition 30, with the Soyuz spacecraft landing on 22 November. The final crewed launch of the year took place on 21 December, when Soyuz TMA-03M was launched to bring a further three crewmembers to the ISS.

Ten spacewalks were conducted in 2011, all of them by ISS or Space Shuttle astronauts. The final spacewalk by a Space Shuttle crew was conducted on 27 May, during the STS-134 mission.

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