Planets that: -Have atmospheres made of other gases (example: flammable gases) -Have no satellites to keep them stable have drastic changes in climate -Don't orbit a star -Don't rotate around their axis (no day/night cycle) -Are dark -Are bright -Have rings -Have collided with others -Orbit more than one star Also add: -Black holes and worm holes -Eclipses -Acid rain -Springs (water shoots up if you dig it. Also makes steam) -Waterfalls -Fog -Smoke -Toxic fumes -Very low gravity -Very high gravity -Mudslides -Avalanches Biomes: -Rainforests -Dead forests -Burnt forests -Corroded forests -Underground forests -Underground ecosystems -Bio-domes Structures: -Crashed starships -Underwater cities -Tree villages -Ghost towns Did I miss something? Reply saying what it is I missed? Which weren't here that you think should have?
