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Join Exploratorium scientists Paul Doherty and Isabel Hawkins as they discuss the Rosetta Mission, which "woke up" on January 20th, 2014 to land on Comet 67P/Churyumov-Gerasimenko and make the most detailed study of a comet ever attempted. Rosetta followed the comet on its journey through the inner Solar System, measuring the increase in activity as the icy surface was warmed up by the Sun.