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This photo released by NASA/JPL on Feb. 15, 2011 shows an image from NASA's Stardust mission of comet Tempel 1 taken on Feb. 14, 2011. The Stardust craft zipped past a comet half the size of Manhattan during a Valentine's Day rendezvous that scientists hoped would shed light on these icy solar system bodies. At nearest approach, the craft passed within 112 miles of the potato-shaped comet, closer than the original prediction. (AP Photo/ NASA/JPL/ Caltech/Cornell)

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