Geocorona meaning

jēō-kə-rōnə
The ultraviolet light emanating from the outermost region of the earth's atmosphere, consisting chiefly of sunlight absorbed and then reemitted from hydrogen atoms.
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The envelope of ionized gases, esp. hydrogen, surrounding the earth at the outer limit of the atmosphere.
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The halo of far-ultraviolet solar light that reflects off the Earth's exosphere .
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The region of ionized hydrogen that makes up the outermost region of the Earth's atmosphere. (by extension of other planets.)
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