Exosphere (noun) Definition, Meaning & Examples

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noun
  1. 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.
noun
  1. the outermost layer of the earth's atmosphere. It extends from about 400 km above the earth's surface
    Exosphere (noun) Definition, Meaning & Examples

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