This document provides information about satellites in our solar system. It defines what a satellite is and lists the four types: shepherd, Trojan, coorbital, and asteroidal. It then lists the number of satellites for each planet in our solar system, with Jupiter having the most at 63. For Earth, it only has one satellite, the Moon. The document discusses the different theories for the origin of the Moon and provides details about the most important satellites for each planet, such as Titan for Saturn and Europa and Ganymede for Jupiter.