Gaia launched flawlessly Thursday morning at 9:12 UTC (4:12 a.m. Eastern Standard Time). This long-awaited mission will precisely map the distances and motions of 1 billion stars in our galaxy.
Comet ISON's untimely demise didn’t prevent scientists from studying it, revealing the comet to be smaller than previously thought and harboring high concentrations of carbon.
NASA's Cassini spacecraft has captured phenomenal images of the gigantic weather system at Saturn's north pole. This so-called "hexagon" is nearly three times wider than Earth is.
If all goes well, on December 14th the Moon will host its first soft-landing spacecraft since 1976.
A complex of three bright, star-forming clumps called Himiko is merging in the early universe. With its light reaching us from when the universe was only 800 million years old, this primordial galaxy could yield insight into the elusive process of early galaxy formation.
The Kepler team has released its analysis of the mission’s first three years of observations. The haul includes 10 Earth-size (and probably rocky) exoplanets in their stars’ habitable zones, and the stats show such planets are common.
Planet Hunters citizen-science program identifies 14 exoplanet candidates the Kepler mission missed, including a seventh planet in a known system, making it the first seven-planet system discovered.