Satellite

A satellite is an object that orbits another object. With sufficient velocity, the object does not collide with the primary object it orbits, but maintains a distance from that object as the rate at which it falls towards that object is similar to the rate that it travels away, thus the object orbits the primary object and becomes a satellite.

All masses in the solar system, including the earth, are satellites of the sun, or satellites of those objects, such as the moon.