Comet landing
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Comet 67P/Churyumov-Gerasimenko is a periodic comet with a 5 by 3 km nucleus that rotates every 12.7 hours. The Rosetta probe arrived at the comet in August 2014, becoming the first spacecraft to orbit a comet. In November 2014, the Philae lander touched down on the comet's surface, and detected organic molecules, providing clues about the early chemistry of our solar system.
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