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The thermosphere is the "hottest" layer of the Earth's atmosphere. As the outermost layer with substantial numbers of molecules, it receives the most direct radiation from the Sun.

However, despite the high molecular temperatures measured in this layer (as high as 2500°C or 4530°F), the matter is tenuous compared to the lower atmosphere. An object within the thermosphere would absorb very little total heat energy. Almost all satellites, and the International Space Station, orbit within the thermosphere. The layer periodically varies in thickness, stretching from about 80 kilometers in altitude to between 250 and 500 kilometers. The thermosphere.

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Karianne Feil

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3y ago

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