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exosphere |
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exosphereUppermost layer of the atmosphere. It is an ill-defined zone above the thermosphere, beginning at about 700 km/435 mi and fading off into the vacuum of space. The gases are extremely thin, with hydrogen as the main constituent. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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But the exospheric "escape rate,' notes Thomas Donahue of the University of Michigan in Ann Arbor, would account for about 1,000 times less water than the proposed comet flux is said to be bringing in. |
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exospheric
