Rosetta

http://www.esa.int/spaceinimages/Images/2013/12/Rosetta_and_Philae_at_comet

The End of Rosetta’s Big Sleep

Europe's comet-chasing spacecraft woke up after a 957-day-long hibernation to begin the most comprehensive comet study to date. Part of its mission: attempt to place an instrumented lander on a comet’s nucleus for the first time.