| Status | Dense atmosphere |
| Altitude | 80-800 kilometers |
| Location | |
| Characteristics | Auroras • gravity waves • dense atmosphere |
| Space agencies involved | NASA • Roscosmos • European Space Agency |
| Impact on traditional space travel | Significant |
| Prominent suborbital flight applications | Scientific research • Military operations |
| Preferred orbits for communications and observation | Geosynchronous orbits |
