There have been no observed collisions between natural satellites, but impact craters may show evidence of such events.
Both intentional and unintentional collisions have occurred between man-made satellites around Earth since the 1980s.
Anti-satellite weapon tests and failed rendezvous or docking operations can result in orbital space debris, which in turn may collide with other satellites.
There have been no observed collisions between natural satellites of any Solar System planet or moon.
Collision candidates for past events are: Three types of collisions have occurred involving artificial satellites orbiting the Earth: Satellite operators frequently maneuver their satellites to avoid potential collisions.