Exosphere

http://astrothesaurus.org/uat/499

dcterms modified equal to or less than 2020-11-03T21:04:25.421Zequal to or more than 2020-11-03T21:04:25.421Z
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http://astrothesaurus.org/uat/437 original
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499 original
definition The outermost portion of the Earth's atmosphere. Extremely tenuous, it lies above the ionosphere from a height of about 500 km, to the edge of interplanetary space. Since the mean free path is much greater than the atmospheric scale height, the atoms or molecules never collide with each other.
narrower
http://astrothesaurus.org/uat/644 original
broader
499 original
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contributor AAS_Frey.Katie original