Meaning Of The Word Exosphere

Real Dictionary

What's the definition of Exosphere? Find Exosphere meanings, definitions and more at the Real Dictionary online.

Exosphere Meaning

Exosphere Definition
Exosphere Definition

What's The Definition Of Exosphere?

exosphere in American English
the outermost portion of a planet's, esp. the earth's, atmosphere, consisting of a hot layer of light atoms often moving at escape velocity
noun: the highest region of the atmosphere, where the air density is so low that a fast-moving air molecule is more than 50 percent likely to escape from the atmosphere instead of hitting other molecules

exosphere in British English
noun: the outermost layer of the earth's atmosphere. It extends from about 400 km above the earth's surface

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