Editing Coupling (physics) (section)

==Astrophysics==

Objects in space which are coupled to each other are under the mutual influence of each other's [[gravity]]. For instance, the Earth is coupled to both the Sun and the Moon, as it is under the gravitational influence of both. Common in space are [[binary system]]s, two objects gravitationally coupled to each other. Examples of this are [[binary star]]s which circle each other. Multiple objects may also be coupled to each other simultaneously, such as with [[globular cluster]]s and [[galaxy group]]s. When smaller particles, such as dust, which are coupled together over time accumulate into much larger objects, [[Accretion (astrophysics)|accretion]] is occurring. This is the major process by which stars and planets form.<ref>{{Cite book|title=Universe, Second Edition|last=Kaufmann|first=William|publisher=W.H. Freeman and Company|year=1988|isbn=978-0-7167-1927-4|url-access=registration|url=https://archive.org/details/universe0002kauf}}</ref>