Comet Siding Spring at Mars: How a Rare Celestial Event Was Discovered

Saturday, October 18, 2014 - 08:30 in Astronomy & Space

Comet Siding Spring — unknown and undiscovered until 2013 — will zoom past the Red Planet Sunday afternoon (Oct. 19) in an encounter that could help scientists better understand how the solar system came to be.

Read the whole article on Space.com

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