A pair of images from the VISTA telescope at the Paranal Observatory in Chile shows the Helix Nebula in infrared (left) and visible light.
NASA launched five rockets to help scientists map the movement of high-altitude winds and create better models of the regions of space that can damage satellites and disrupt communications systems.
Saturn's moon Tethys, with its stark white icy surface, peeps out from behind the larger, hazy, colorful Titan.
The rugged landscape of the Canary Islands stood out in sharp contrast to the smooth blue waters of the Atlantic Ocean and the flat tan land of northwestern Africa.
