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ScienceCasts: Colliding Atmospheres - Mars vs Comet Siding Spring

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Published on Aug 6, 2014

Visit http://science.nasa.gov/ for more.

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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