While Mitt Romney's and Rick Santorum's thoughts were on the Midwest and Colorado Tuesday evening, Newt Gingrich suggested his head was in the clouds.

The Hubble Telescope has made it possible to study the physical properties of a galaxy of forming stars when the universe was much younger. NASA credits a

Iran launched an observation satellite into orbit Friday to mark the anniversary of the 1979 Islamic Revolution, at a time of tensions over its nuclear

SpaceX's first cargo flight to the International Space Station may have been delayed, but the company has taken a step closer to the first private manned

Russia's space agency said Tuesday that it was prepared to make another attempt at a Mars mission, as it blamed cosmic rays interfering with computer systems

Ready for an out-of-this-world Facebook experience? A new game promises to deliver has just taken off.

As Mitt Romney tries to bring Newt Gingrich back to Earth, the former House speaker is standing by his high-flying plans to ensure America is at the cutting

A NASA mission has discovered 11 new planetary systems, giving astronomers a better idea of how planets form.

A small asteroid was set to make a close pass of the Earth on Friday, passing within 36,750 miles of the planet.