Moons
Moons are small rocky worlds circling around planets. They come in three types, Small Moons, Medium Moons and Large Moons. Additionally Rings and Trojan Asteroids are treated as a special type of moon with various limitations.
Moons cannot have moons themselves. Small moons take up one 
lunar orbit, medium moons and rings take up two lunar orbits and large moons take up four lunar orbits. You do not have to fill up all lunar orbits.
| Moon Type | Cost | Lunar Orbits Used | Zones | Zone Restriction | |
|---|---|---|---|---|---|
 | Medium Moon | 3 | 2 | 3 | none |
 | Large Moon | 7 | 4 | 7 | none |
 | Small Moon | 1 | 1 | 1 | none |
 | Trojan Asteroids | 1 | 0 | 2 |  only, no upgrades |
 | Rings | 1 | 2 | 2 | only, no upgrades |
Moons automatically adopt the orbit type (either 
, 
or 
) of their planets, including the production bonuses and penalties associated with those orbits.