On April 27, a blast of light from a dying star in a distant galaxy became the focus of astronomers around the world.
A new image from NASA's Curiosity Mars rover is the first ever from the surface of Mars to show an asteroid, and it shows two: Ceres and Vesta.
A federal judge declared Monday that the National Security Agency's bulk collection of Americans' telephone records is likely to violate the Constitution's ban on unreasonable search.
NASA's first mission to sample an asteroid is moving ahead into development and testing in preparation for its launch in 2016.
NASA's Wide-Field Infrared Survey Explorer (WISE) has turned up no evidence of the hypothesized celestial body in our solar system commonly dubbed "Planet X."
Sunset is a special time of day. Low-hanging clouds glow vivid red and orange as the background sky turns cobalt blue.
Black holes can be petite, with masses only about 10 times that of our sun -- or monstrous, boasting the equivalent in mass up to 10 billion suns.
For every thought or behavior, the brain erupts in a riot of activity, as thousands of cells communicate via electrical and chemical signals.
The U.S. Air Force is working as fast as it can to certify the ability of privately held Space Exploration Technologies, or SpaceX, to compete for work launching military and intelligence satellites
Wednesday was another key day for a challenge to the government's ability to indefinitely detain anyone under the laws of war.
An upcoming conference in the Phoenix, Arizona, region next week seems to have the potential to expand knowledge and understanding
By analyzing the distinctive cracks lining the icy face of Europa, NASA scientists found evidence that this moon of Jupiter likely spun around a tilted axis at some point.
On April 24, 1990, the space shuttle Discovery lifted off from Earth with the Hubble Space Telescope nestled securely in its bay.
NBC today announced an exclusive deal with Sir Richard Branson’s Virgin Galactic
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