DARMSTADT, GERMANY - NOVEMBER 12:  (EDITORIAL USE ONLY) In this February 17, 2014 handout photo illustration provided by the European Space Agency (ESA) the Philae lander is pictured descending onto the 67P/Churyumov-Gerasimenko comet. ESA will attempt to land the Philae lander onto the comet in the afternoon (GMT) of November 12 which, if successful, will be the first time ever that a man-made craft has landed onto a comet. The Philae lander, launched from the Rosetta probe, is a mini laboratory that will harpoon itself to the surface, though a problem with a gas thruster detected November 11 is making the outcome of the landing uncertain.  (Photo ESA via Getty Images)
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