Editing Planetary system (section)

{{Short description|Set of non-stellar objects in orbit around a star}}
{{redirect|Solar systems|the Sun and its planetary system|Solar System|a system of stars|Star system|the solar power company|Solar Systems (company)}}
{{Use mdy dates|date=April 2019}}
[[File:Artist Concept Planetary System.jpg|thumb|250px|An artist's concept of a planetary system]]

A '''planetary system''' is a set of [[gravity|gravitationally]] bound non-stellar [[Astronomical object|bodies]] in or out of [[orbit]] around a [[star]] or [[star system]]. Generally speaking, systems with one or more [[planet]]s constitute a planetary system, although such systems may also consist of bodies such as [[dwarf planet]]s, [[asteroid]]s, [[natural satellite]]s, [[meteoroid]]s, [[comet]]s, [[planetesimal]]s<ref>{{Cite book |last=Darling |first=David J. |title=The universal book of astronomy: from the Andromeda Galaxy to the zone of avoidance |date=2004 |publisher=Wiley |isbn=978-0-471-26569-6 |location=Hoboken (NJ) |pages=394}}</ref><ref>{{Cite book |title=Collins dictionary astronomy |date=2000 |publisher=HarperCollins |isbn=978-0-00-710297-6 |editor-last=Illingworth |editor-first=Valerie |edition=2 |location=Glasgow |pages=314}}</ref> and [[circumstellar disk]]s. For example, the [[Sun]] together with the planetary system revolving around it, including [[Earth]], form the [[Solar System]].<ref>p. 382, ''Collins Dictionary of Astronomy''.</ref><ref>{{Cite book |title=A dictionary of astronomy |date=2003 |publisher=Oxford University Press |isbn=978-0-19-860513-3 |editor-last=Ridpath |editor-first=Ian |edition=Rev. |series=Oxford paperback reference |location=Oxford ; New York |pages=420}}</ref> The term '''exoplanetary system''' is sometimes used in reference to other planetary systems. Planetary systems are, by convention, named for their host, or parent star, as is the case in our Solar Planetary System, named for its hosting, star, "Sol".

{{Extrasolar planet counts|full}} [[Debris disk|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.