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Apollo 16
Color enhancement of image of earth photographed by UV camera

A color enhancement of an ultraviolet photograph of the spectrum of the upper atmosphere of the Earth and geocorna. The bright horizontal line is far ultraviolet emission (1215 angstrom) of hydrogen extending 10 degrees (40,000) miles either side of the Earth. The knobby vertical line shows several ultraviolet emissions from the Earth's sunlit atmosphere, such "lump" being produced by one type of gas (oxygen, nitrogen, helium, etc.). The spectral dispersion is about 10 Angstrom per millimeter on this enlargement.

Catalog Date: 21 April 1972
Film Type: 4x5
NASA image: S72-40820

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