Earth's Exosphere
The main gases within the Earth's exosphere are the lightest atmospheric gases, mainly hydrogen, with some helium, carbon dioxide, and atomic oxygen near the exobase. Since there is no clear boundary between outer space and the exosphere, the exosphere is sometimes considered a part of outer space.
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Famous quotes containing the word earth:
“Or ever the silver cord be loosed, or the golden bowl be broken, or
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Then shall the dust return to the earth as it was: and the spirit
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Vanity of vanities, saith the preacher, all is vanity.”
—Bible: Hebrew Ecclesiastes (l. XII, 6–7)