From more than 30 million miles away, a NASA spacecraft snapped away as the Moon made a graceful pass in front of Earth's colorful disk.

Astronomers find that the organic compounds common throughout our galaxy and others suddenly disappear along M101's outer edge.

Astronomers use the 12-million-kelvin-blaze of a galaxy's central region to measure its supermassive black hole.

New observations from a NASA orbiter reveal that water and rock freely mingled across (or under) much of the Red Planet's surface.

It took three years to settle on a name for the third-largest object in the Kuiper Belt.

Astronomers have designed a neural network that can determine the particulars of binary star systems by just examining their light curves — and it can do it really, really fast.

The Astronomical League has announced its best webmaster for 2008.

A recent survey of stars in the Orion Nebula Cluster reveals that less than 10% of stars there have enough material in their surrounding disks to form Jupiter-sized planets.

Where did the dozens of known binary asteroids come from? According to a new finding, sunlight alone can force a body to spin in such a frenzy that it literally flies apart.

A subclass of supernovae that fades much faster than expected reveals possible kinks in astronomers' theories of what causes these explosions.

Traces of water recently found in glassy granules brought back 40 years ago by the Apollo 15 crew suggest scientists haven't quite figured out yet just how our Moon formed.

The main mirror for the world's most advanced flying observatory has been transformed from a carefully shaped and polished piece of glass into a highly reflective optical component ready to study the infrared universe.

Recent calculations for a pair of failed stars add to astronomers' scant knowledge of brown dwarfs and will help set a reference point for future studies.

During its first flyby of Mercury, NASA"s Messenger spacecraft found much less iron on the planet’s surface than expected and a cloud of ionized atoms — including water — caught up in the planet’s magnetosphere. And that’s just for starters.