Editing Planetary system (section)

====Other components====
{{Further|Circumplanetary disk}}
Computer modelling of an impact in 2013 detected around the star [[2MASS J08090250-4858172|NGC 2547-ID8]] by the [[Spitzer Space Telescope]], and confirmed by ground observations, suggests the involvement of large asteroids or [[protoplanet]]s similar to the events believed to have led to the formation of terrestrial planets like the Earth.<ref>{{Cite web |title=NASA's Spitzer Telescope Witnesses Asteroid Smashup |url=https://www.jpl.nasa.gov/news/nasas-spitzer-telescope-witnesses-asteroid-smashup/ |access-date=2025-05-17 |website=NASA Jet Propulsion Laboratory (JPL) |language=en-US}}</ref>

Based on observations of the Solar System's large collection of natural satellites, they are believed common components of planetary systems; however, the existence of [[exomoons]] has not yet been confirmed. The star [[1SWASP J140747.93-394542.6]], in the constellation [[Centaurus]], is a strong candidate for a natural satellite.<ref>{{Cite web |title=Saturn-like ring system eclipses Sun-like star |url=https://www.sciencedaily.com/releases/2012/01/120109115830.htm |access-date=2025-05-17 |website=ScienceDaily |language=en |quote=Mamajek thinks his team could be either observing the late stages of planet formation if the transiting object is a star or brown dwarf, or possibly moon formation if the transiting object is a giant planet.}}</ref> Indications suggest that the confirmed extrasolar planet [[WASP-12b]] also has at least one satellite.<ref>[http://www.ria.ru/science/20120206/558647431.html Российские астрономы впервые открыли луну возле экзопланеты] (in Russian) – "Studying of a curve of change of shine of WASP-12b has brought to the Russian astronomers unusual result: regular splashes were found out.<...> Though stains on a star surface also can cause similar changes of shine, observable splashes are very similar on duration, a profile and amplitude that testifies for benefit of exomoon existence."</ref>