planetary system
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A planetary system is a group of planets, moons, asteroids, and other objects that orbit around a star. Understanding planetary systems helps us learn about how stars and planets form, and it expands our knowledge of the universe beyond our own solar system.
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Article
An artist's concept of a 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).