See also: exosphère

English edit

 
English Wikipedia has an article on:
Wikipedia

Etymology edit

exo- +‎ -sphere

Pronunciation edit

  • (file)

Noun edit

exosphere (plural exospheres)

  1. the uppermost layer of a planet's atmosphere
  2. 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 edit