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Comet Siding Spring: October 19, 2014

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Colliding Atmospheres: Mars vs Comet Siding Spring - 8/06/2014 Comet Siding Spring is about to fly historically close to Mars. The encounter could spark Martian auroras, a meteor shower, and other unpredictable effects. Whatever happens, NASA's fleet of Mars satellites will have a ringside seat.

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