Moon

From SporeWiki, the knowledge base dedicated to Spore

On some planets in Spore, there will be a moon orbiting them. They are usually found orbiting a Gas Giant, but are also orbiting your Homeworld as well as few other planets, like Earth.

In the 2006 E3 video Will Wright pulls his UFO up to an inhabited Moon that was obviously orbiting a large gas giant-type planet. It is later revealed that the moon was a colony of an alien civilization called Greevils.

[edit] Trivia

• Your homeworld will always have a moon, which is probably the planet there if there was no empire there. The Gas Giant in your Solar System will not, however many other Gas Giants do.

• Destroying a planet with a Planet Buster will also destroy its moon, but destroying a moon will not destroy the planet.

• Even though it is called a moon, it has nearly identical function to planets; other than the fact that the moons are orbiting another planet, and the fact that they have less land for colonies.