Eroded Valleys on Mars
This image was taken by the European Space Agency's Mars Express spacecraft, and shows a system of outflow channels called…
Cassini Discovers Two New Moons
Cassini has uncovered two new mini-moons of Saturn, orbiting between Mimas and Enceladus. The new moons have been dubbed S/2004…
Chandra Sees Clouds Coming Together
A new image of Abell 2125, taken by the Chandra X-Ray Observatory, shows several intergalactic clouds of hot gas in…
Evidence for Planets Around a Young Star
An astronomer from the University of Hawaii has captured a detailed image of a dust disk around a new star;…
Star Clusters Could Be Galaxy Remnants
Globular star clusters - groupings of millions stars in close formation - are some of the most beautiful objects in…
Genesis Heads for Home
NASA's Genesis spacecraft made an important flight correction maneuver on Monday, which put it on course to return to the…
Hubble Sees a Gas Cavity in Space
The Hubble Space Telescope has revealed an unusual situation where a young, hot star is carving out a cavity in…
Wallpaper: Little Ghost Nebula
Okay, new background. This time you'll be switching your computer desktop to show the Little Ghost Nebula - known to…
How the Solar Wind Gets Past the Earth’s Shield
The European Space Agency's Cluster spacecraft have helped answer a 17-year mystery about how the magnetosphere, a magnetic bubble that…
Cassini’s View of Tiny Hyperion
This is the best picture that Cassini's taken so far of Hyperion, one of Saturn's smaller moons (266 kilometers, 165…