Stories by SPACE.com

Data from the Dawn spacecraft now reveal that Vesta, as wide as the state of Arizona, is large enough to have had its own internal geologic evolution

Blue Origin's spacecraft sports a biconic shape and recently underwent wind tunnel testing at a Lockheed Martin facility in Dallas

The MAVEN mission will investigate Mars's upper atmosphere, in an attempt to understand what caused it to disappear

The "Star Trek" actor was on hand when the shuttle Enterprise flew in atop a jumbo jet Friday and explained the show's influence on the shuttle's name

North Korean officials have said the Unha 3 rocket, a three-stage booster, was carrying a small weather- and Earth-monitoring satellite

There can sometimes be discrepancies between the ecclesiastical and astronomical versions for dating Easter

A giant telescope will soon begin its search for the first stars and galaxies

Two Congressmen expressed concern that the 2013 budget proposal takes away from NASA's robotic missions to Mars

New discoveries are making chlorophyll-d and a cyanobacterium named Acaryochloris marina interesting for scientists trying to find life on extrasolar planets

Spring is arriving early in a meteorological sense in the eastern U.S., and in an astronomical sense as well, making its earliest arrival since 1896

The online Slooh Space Camera will broadcast a free, real-time feed of the Mars opposition, beginning at 11:00 P.M. EST

A match of silicon isotopes in terrestrial and lunar rock samples is revealing more about how both bodies really formed

Subdued seasonality might be linked to the emergence of complex life on Earth around 600 million years ago

A potentially habitable alien planet has been found orbiting a nearby star

The array could be the most complex and versatile radio telescope ever attempted, with the capacity to sweep the entire northern sky in 45 days for low-frequency radio waves

Although it can be tough for observers in the West to vet such claims from the Russians, fears that Phobos-Grunt's fall would cause dangerous chemicals to rain from the sky are probably unfounded, experts say

At most, 20 to 30 fragments of Phobos-Grunt, weighing a total of less than 200 kilograms, may reach Earth’s surface, most likely the ocean

The finding should help scientists better understand the ever-expanding universe and the nature of dark energy

Scientists hope that by plotting out the distribution of dark matter throughout space, they will come closer to understanding what it is

The probes' measurements will be used to construct detailed maps of the moon's gravitational field, revealing a great deal about lunar composition

The report stresses the importance of stricter guidelines for the release of lunar materials to researchers, and more meticulous inventory procedures

The discovery, of objects 9.7 billion solar masses large or more, suggests there is still much to learn about how monster black holes grow

The incident has become a lessons-learned example of miscommunication in assuring that planetary protection procedures are strictly adhered to

A veteran satellite spotter tracked Russia's Phobos-Grunt spacecraft as it passed over the southern Netherlands on Tuesday