The international Cassini mission has spotted what appears to be a river valley on Saturn’s moon Titan that stretches more than 400 km from its ‘headwaters’ to a large sea. It is the first time images have revealed a river system this vast and in such high resolution anywhere beyond Earth. Titan is the only other world we know of that has stable liquid on its surface. While Earth’s hydrologic cycle relies on water, Titan’s equivalent cycle involves hydrocarbons such as ethane and methane.
Super-long exposure of star trails (top two-thirds), earth and lit cities (bottom third), a Japanese part of the ISS, and sunlight bouncing off of our thin atmosphere. Expedition 31 Flight Engineer Don Pettit on the International Space Station
This space wallpaper is a mosaic showing part of the Noctis Labyrinthus region, the ‘Labyrinth of the Night’, on Mars. It was composed by Bill Dunford using scenes available in the Mars Express image archive, HRSC view.
landing of NASA's huge Mars rover Curiosity alongside like-minded space fans can head to Times Square here on Sunday night to catch the rover's touchdown on the Red Planet live on a giant LED television screen.
NASA's Mars rover Curiosity took this self-portrait, composed of more than 50 images using its robotic arm-mounted MAHLI camera, on Feb. The image shows Curiosity at the John Klein drill site. A drill hole is visible at bottom left.