Concept information
Preferred term
Geocorona
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. (en)
Broader concept
- Exosphere (en)
Editorial note
URI
http://astrothesaurus.org/uat/644
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