Moon

Moons are celestial objects in orbit around a planet. The moons don't actually "move", since most of the bodies in SSE2 are made of terrain. It would be possible but extremely laggy and buggy to do so. There are exceptions like Phobos and Deimos, since those are parts, not terrain.

25 moons exist in-game: 23 in the Solar System, one in the Proxima Centauri System, and one in the Tutorial System. The amount of Solar System moons can vary slightly: Phobos and Deimos can be de-orbited and crash into Mars, which in turn form Alcaeus, and The Moon can be destroyed by Nibiru, but this isn't always the case.