Extraterrestrial Life

After nearly four years mapping the cosmos, the Herschel Space Observatory is expected to exhaust its vital supply of liquid helium coolant within the next few weeks

Low-mass binary stars could make the best hosts for alien life because their combined energy extends the habitable region farther away than would exist around a single star

The upcoming cosmic spectacle should offer scientists a chance to test some of their theories about how black holes accrete mass

NASA's Mars Reconnaissance Orbiter used radar to find the underground Martian channels

NASA's MESSENGER probe has imaged every square meter of the planet's surface

The Dragon capsule is due to deliver 544 kilograms of scientific experiments and supplies to the space station on Saturday

A Jupiter-like gas giant, 335 light-years from Earth, is caught in the process of formation by the European Southern Observatory's Very Large Telescope in Chile

The discovery could help astronomers better understand how these behemoths grow

Cassini's observations are giving scientists a look at processes that occur during star explosions

The newly detected world is smaller than any of the solar system’s planets and just a bit larger than our moon

Rocketing through space at more than three million kilometers per hour, six speedy stars were likely ejected from the giant black hole in the center of the Milky Way

Water on the moon was there as the moon formed, not delivered later by solar wind and comets