Astronomy Picture of the Day

Explanation: A little spacecraft that was presumed lost has now been found. In 2014, the Philae lander slowly descended from its parent Rosette spacecraft to the nucleus of Comet C67/P Churyumov-Gerasimenko. At the surface, after a harpoon malfunction, the lander bounced softly twice and eventually sent back images from an unknown location. Earlier this month, though, Rosette swooped low enough to spot its cub. The meter-sized Philae is seen on the far right of the main image, with inset images showing both a zoom out and a zoom in. At the end of this month, Rosette itself will be directed to land on 67P, but Rosette's landing will be harder and, although taking unique images and data, will bring the mission to an end.