After orbiting the comet from August 2014, Rosetta released Philae for the first landing on a comet nucleus.
Rosetta reached comet 67P on 6 August 2014 and became the first spacecraft to orbit a comet [1, 7]. On 12 November Philae touched down at 15:34 GMT comet time, but its harpoons did not fire and it bounced twice before settling at 17:32 GMT [4].
In its shadowed final position Philae operated for nearly 57 hours on battery power and completed its main planned sequence of surface measurements before going silent [5].
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