Exosphere: Difference between revisions
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| This four-sentence stub has been merged into Earth's atmosphere. Please delete. Milton Beychok 21:10, 22 January 2010 (UTC) |
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Exosphere [r]: The uppermost layer of an atmosphere. [e]
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The exosphere is the outermost layer of Earth's atmosphere. Its lower limit is the exobase at about 500 km above the Earth's surface.
The exosphere is so thin that particles within it (atoms, molecules, or ions) do not collide. As a result, particles in the exosphere can escape altogether from Earth's atmosphere into space.