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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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To distinguish among these processes, spectrometers on the craft will compare the composition of the exosphere with that of surface rocks. Then there is the notion of accelerating oxygen and hydrogen from the outermost reaches of the atmosphere, or exosphere, downward into the nightside by means of magnetic and electric fields from the solar wind. But the ISS orbits 402 km (250 mi) above Earth in the exosphere (upper atmosphere). |
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