exosphere — English Dictionary

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Language

exosphere

Pronunciations (2)

/ˈɛksəʊsfɪə/
Pronunciation notes
- Received-Pronunciation
/ˈɛksoʊsfɪɚ/
Pronunciation notes
- General-American

Noun

the uppermost layer of a planet's atmosphere
an extremely thin atmosphere, as on Saturn's moon Dione

Examples

"Scientists weren't even sure Dione would be big enough to hang on to an exosphere" ('Cassini Detects Hint of Fresh Air at Dione', , JPL, Mar. 02, 2012)

Noun

the outermost atmospheric layer

Broader terms
layer

Word forms

exospheres

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