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Exosphere vs Hydrosphere - What's the difference?

exosphere | hydrosphere |

As nouns the difference between exosphere and hydrosphere

is that exosphere is the uppermost layer of a planet's atmosphere while hydrosphere is all the waters of the Earth, as distinguished from the land and the gases of the atmosphere.

exosphere

English

(wikipedia exosphere)

Noun

(en noun)
  • 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)

    • hydrosphere

    English

    (wikipedia hydrosphere)

    Noun

    (en noun)
  • All the waters of the Earth, as distinguished from the land and the gases of the atmosphere.