Satellite
From Kerbal Space Program Wiki
A satellite is any object orbiting a celestial body, called its primary. Satellites can be naturally created orbiting bodies (planets, moons, asteroids), or artificial objects.
Artificial satellites
- → Main article: Probe
Artificial satellites can be used for unmanned flights to test rocket designs, or to travel to other planetary bodies to collect scientific data. With the addition of the career mode and science mode, satellites are not available until later in a game due to the lack of command probes.
Natural satellites
Any celestial body which is not orbiting a star a natural satellite and are commonly known as moons.
The following planetary bodies are natural satellites: