SUNSET: 
Scrutinizing Supernovae
Astronomers uncover new clues about what happens in the crucial Type Ia variety of exploding star.
The Oldest, Weirdest Planet
It orbits not just one star, but two. And it's almost as old as the universe itself.
Keck Interferometer Measures a Future Solar System
In a technological tour de force, the two giant Keck telescopes combine light waves for super-sharp resolution of the disk around a young star.
NASA To Launch Glowing Night Clouds
NASA will release three luminous clouds into the night sky over the Eastern Seaboard as early as tonight.
Delta Scorpii Still Showing Off
For the fourth summer in a row, a special star near Antares is shining abnormally bright.
News from the Sun
Solar astronomers meeting this week have announced a spate of new research results about our home star.
A New Neighbor Star
Astronomers turn up a faint red dwarf just a few light-years from the solar system.
Views of the Pale Blue Dot
NASA's Mars Global Surveyor has become the latest spacecraft to image the Earth-Moon pair from afar.
The Deepest Photo Ever Taken
The Hubble telescope's newest and best camera has broken the record for imaging the faintest stars and galaxies.
Titan's Surface: Mostly Ice, Not Goo
Saturn's large, haze-shrouded moon is covered mostly with dirty ice rather than exotic hydrocarbons, according to the best spectral evidence yet.
Astro Image in the News:
A Spectacular Light Echo
An erupting star in Monoceros spreads its light across surrounding gas and dust.
How Bright Was History's Brightest Supernova?
The dazzling supernova of the year 1006 amazed the medieval world. Now astronomers have pinned down its distance and brightness.
Catching Ancient Stardust
Tiny grains blown off from stars that existed before the solar system formed are sifting down all around us.
Mapping the Big Bang
Results from NASA's MAP satellite strengthen the new cosmology.
Observing the Leonids
Here are some tips to help you observe the Leonid meteor shower.
Cosmic Rays from the Kuiper Belt
The "anomalous cosmic rays" have finally had their origin pinned down — in the outer reaches of the solar system.
Dark Matter Gets a Reality Check
There's no way to avoid it; galaxies really are surrounded by halos of unknown, invisible stuff.
A Double Star's Planet
Astronomers have discovered the first planet that orbits one star of a close pair.
Gamma-Ray Burst Caught in the Act
A fast worldwide alert enables astronomers to snag their best-observed gamma-ray burst ever.
Midsize Black Holes in Midsize Star Clusters
Black holes with several thousand times the Sun's mass have unexpectedly turned up in the cores of globular clusters.
