photo-s72-36972. NASA public domain image colelction.

S72-36972 (21 April 19720) --- A color enhancement of a far-ultraviolet photo of the Earth taken by astronaut John W. Young, commander, with the ultraviolet camera on April 21, 1972. The original black and white photo was printed on Agfacontour film three times, each exposure recording only one light level. The three light levels were then colored blue (dimmest), green (next brightest), and red (brightest). The three auroral belts, the sunlit atmosphere and the background stars (one very close to the Earth, on left) can be studied quantitatively for brightness. The UV camera was designed and built at the Naval Research Laboratory, Washington, D.C. EDITOR?S NOTE: The photographic number of the original black & white UV camera photograph from which this enhancement was made is AS16-123-19657.
NASA Identifier: HSF-photo-s72-36972