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10 of the most memorable space photos

The crescent planet Neptune and its crescent moon Triton, as seen by NASA's Voyager 2 spacecraft in 1989.

Photo: Voyager 2/NASA

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Neptune's double crescent

Astronomer Greg Laughlin of the University of California, Santa Cruz nominated an image of the crescent planet Neptune and its crescent moon Triton taken by NASA's Voyager 2 spacecraft in 1989. "There's no false color, no artifice, no agenda," Laughlin said."This photograph is calming, mysterious and aesthetically perfect."