Best Space Photos of the Week - Nov. 16, 2013

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Two Comets Spotted by NASA Spacecraft Orbiting Mercury (Photo)

Credit: NASA/Johns Hopkins University Applied Physics Laboratory/Carnegie Institution of Washington/Southwest Research Institute
NASA's Messenger probe orbiting Mercury spotted and photographed Comet Encke and Comet ISON — two comets set to make close brushes with the sun later this month. [Read the Full Story]
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