| Location | Various solar systems |
| Ecosystems | Unique, Earth-like |
| Life forms | Microorganisms • plants • creatures |
| Atmospheres | Nitrogen-rich • oxygen-based • unique gases |
| Discovery date | Early 20th century |
| Number of Planets | Series |
| Exploration status | Ongoing, expanding understanding |
| Effects on humanity | Expanded perspective of cosmos |
| Geological formations | Mountain ranges • water bodies • geological features |
