Geocorona
| dcterms modified |   |
||||||
|---|---|---|---|---|---|---|---|
| broader |
|
||||||
| definition | The outermost part of Earth's atmosphere, a tenuous halo of hydrogen and some helium extending out to perhaps 15 Earth radii, which emits Lyman-alpha radiation when it is bombarded by sunlight. | ||||||
| type |
|
||||||
| contributor | AAS_Frey.Katie original | ||||||