Community hub
Recent from talks
Contribute something to knowledge base
Content stats: 0 posts, 0 articles, 1 media, 0 notes
Members stats: 0 subscribers, 0 contributors, 0 moderators, 0 supporters
Subscribers
Supporters
Contributors
Moderators
Hub AI
Planetary system AI simulator
(@Planetary system_simulator)
Hub AI
Planetary system AI simulator
(@Planetary system_simulator)
Planetary system
A planetary system consists of a set of non-stellar bodies which are gravitationally bound to and in orbit of a star or star system. Generally speaking, such systems will include planets, and may include other objects such as dwarf planets, asteroids, natural satellites, meteoroids, comets, planetesimals, and circumstellar disks. The Solar System is an example of a planetary system, in which Earth, seven other planets, and other celestial objects are bound to and revolve around the Sun. The term exoplanetary system is sometimes used in reference to planetary systems other than the Solar System. By convention planetary systems are named after their host, or parent, star, as is the case with the Solar System being named after "Sol" (Latin for sun).
As of 29 July 2025, there are 6,032 confirmed exoplanets in 4,530 planetary systems, with 989 systems having more than one planet. Debris disks are known to be common while other objects are more difficult to observe.
Of particular interest to astrobiology is the habitable zone of planetary systems where planets could have surface liquid water, and thus, the capacity to support Earth-like life.
The International Astronomical Union (IAU) has described a planetary system as the system of planets orbiting one or more stars, brown dwarfs or stellar remnants. The IAU and NASA consider the Solar System a planetary system, including its star the Sun, its planets, and all other bodies orbiting the Sun.
Other definitions of planetary system explicitly include all bodies gravitationally bound to one or more stars.
Heliocentrism is a planetary model that places the Sun is at the center of the universe, as opposed to geocentrism (placing Earth at the center of the universe).
The idea was first proposed in Western philosophy and Greek astronomy as early as the 3rd century BC by Aristarchus of Samos, but received no support from most other ancient astronomers.
Some also interpret Aryabhatta's writings in Āryabhaṭīya as implicitly heliocentric, although this has also been rebutted.
Planetary system
A planetary system consists of a set of non-stellar bodies which are gravitationally bound to and in orbit of a star or star system. Generally speaking, such systems will include planets, and may include other objects such as dwarf planets, asteroids, natural satellites, meteoroids, comets, planetesimals, and circumstellar disks. The Solar System is an example of a planetary system, in which Earth, seven other planets, and other celestial objects are bound to and revolve around the Sun. The term exoplanetary system is sometimes used in reference to planetary systems other than the Solar System. By convention planetary systems are named after their host, or parent, star, as is the case with the Solar System being named after "Sol" (Latin for sun).
As of 29 July 2025, there are 6,032 confirmed exoplanets in 4,530 planetary systems, with 989 systems having more than one planet. Debris disks are known to be common while other objects are more difficult to observe.
Of particular interest to astrobiology is the habitable zone of planetary systems where planets could have surface liquid water, and thus, the capacity to support Earth-like life.
The International Astronomical Union (IAU) has described a planetary system as the system of planets orbiting one or more stars, brown dwarfs or stellar remnants. The IAU and NASA consider the Solar System a planetary system, including its star the Sun, its planets, and all other bodies orbiting the Sun.
Other definitions of planetary system explicitly include all bodies gravitationally bound to one or more stars.
Heliocentrism is a planetary model that places the Sun is at the center of the universe, as opposed to geocentrism (placing Earth at the center of the universe).
The idea was first proposed in Western philosophy and Greek astronomy as early as the 3rd century BC by Aristarchus of Samos, but received no support from most other ancient astronomers.
Some also interpret Aryabhatta's writings in Āryabhaṭīya as implicitly heliocentric, although this has also been rebutted.
Recent media
Recent media