This picture was taken by the fisheye lens camera on the Huygens probe as in descended to the surface of Titan - Saturn's largest moon. Titan is wreathed by a thick layer of clouds, and its suface cannot be seen from the Earth. This probe was released from the Cassini orbiter on a close approach of Titan, and parachuted down through Titan's atmosphere to land on the surface. Even cooler, if you check on NASA's website you can find a time-lapse video of the descent to the surface, as seen by this fisheye lens. Very cool.