PlanetClass:
| "Ammonia world"
| "Earthlike body"
| "Gas giant with ammonia based life"
| "Gas giant with water based life"
| "Helium rich gas giant"
| "High metal content body"
| "Icy body"
| "Metal rich body"
| "Rocky ice body"
| "Rocky body"
| "Sudarsky class I gas giant"
| "Sudarsky class II gas giant"
| "Sudarsky class III gas giant"
| "Sudarsky class IV gas giant"
| "Sudarsky class V gas giant"
| "Water giant"
| "Water world"
Planet classes