The Danish 1.54-metre telescope has captured a striking image of NGC 6559, an object that showcases the anarchy that reigns when stars form inside an interstellar cloud.

NASA is inviting the public to submit their names and a personal message for a DVD to be carried aboard a spacecraft that will study the Martian upper atmosphere.

NASA scientists don't often learn that their spacecraft is at risk of crashing into another satellite. However, Fermi was just one week away from an unusually close encounter with Cosmos 1805, a defunct spy satellite dating back to the Cold War.

New research has revealed how Saturn keeps itself looking young and hot while other planets become darker and cooler as they age.

Astronomers have for the first time identified discrete sources that account for nearly all the radio waves coming from distant galaxies.

Physicists present the first direct evidence of how atoms of antimatter interact with gravity

The Herschel space observatory has exhausted its supply of liquid helium coolant, essential to cool the observatory's instruments.

This awesome new timelapse video includes amazing star trails, the Milky Way, and a pink desert aurora.

When objects in Earth orbit collide, they create thousands of orbiting fragments. Then, the fragments collide.

Best photos from EarthSky friends around the world of the partial lunar eclipse of April 25, 2013.