Astronomy Cast Ep. 354: Mars vs Comet Siding Spring

By Fraser Cain - October 23, 2014 at 2:55 PM UTC | Planetary Science

We were witness to a once in a million year event. A close approach of Comet Siding Spring to the Planet Mars. And fortunately, humanity had a fleet of spacecraft orbiting the Red Planet, ready to capture this monumental event in real time. What did we see? What will we learn?

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