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Associated Press
In this Sunday, March 10, 2013 photo taken with a 600-millimeter telephoto lens, comet Pan-STARRS appears between the clouds low in the western sky as seen from Harrells, N.C. The comet, which was closest to the sun on Sunday, is expected to become more easily visible to observers in the Northern Hemisphere during the coming week. (AP Photo/The Fayetteville Observer, Johnny Horne)

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