Exosphere
From Memory Alpha, the free Star Trek reference
The exosphere is the outermost layer of a planet's atmosphere. Orbital skydiving is done from exospheric altitudes. (VOY: "Extreme Risk")
On stardate 43779.3, the USS Enterprise-D was preparing exospheric charts of the Hayashi system, an essential step towards colonization, before it was intercepted by the USS Hood. (TNG: "Tin Man")
| Structure and layers of an atmosphere |
|---|
| Planetary: Troposphere • Stratosphere • Thermosphere • Exosphere Ozone layer • Ionosphere • Magnetosphere |
| Solar: Photosphere • Chromosphere • Corona |
