exosphere
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See also: exosphère
English
Etymology
Pronunciation
Noun
exosphere (plural exospheres)
- the uppermost layer of a planet's atmosphere
- an extremely thin atmosphere, as on Saturn's moon Dione
- "Scientists weren't even sure Dione would be big enough to hang on to an exosphere" ('Cassini Detects Hint of Fresh Air at Dione', Cassini Solstice Mission, JPL, Mar. 02, 2012)
Translations
the uppermost layer of a planet's atmosphere
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