SUNSET: 
Asteroids Pale After Close Encounters
A new analysis reveals that asteroids with "fresh" surfaces may have been disrupted by near-Earth encounters in the last few hundred thousand years.
New Report Spotlights Impact Hazards
A meaty review of the impact hazard facing Earth has just been released by the U.S. National Research Council. The bottom line? If Congress and NASA are serious about finding all the truly threatening asteroids in our planet's vicinity, they'd better fund the search properly.
A Strange "Comet" Among the Asteroids
It looks a comet, or at least parts of one, in high-power telescopic images. But in the two weeks since the discovery of P/2010 A2, astronomers are still wondering what's going on with this unusual object and its asteroid sidekick some 95 million miles from Earth.
Spacecraft Imaging for Amateurs
An international community of space enthusiasts has become adept at reinterpreting images from planetary spacecraft.
January 15th's Rare Annular Eclipse
The longest annular eclipse of the Sun until the year 3043 happens tomorrow — but only a luck few (million) will be positioned to see it.
The Great Daylight Comet of 1910
Imagine a comet appear bright enough to be seen in broad daylight — that's exactly what happened 100 years ago.
IYA 2009 Comes to a Close
An unprecedented yearlong celestial celebration — the International Year of Astronomy 2009 — officially came to a close on January 9th and 10th in Padua, Italy.
Exoplanet News Roundup
From little red dwarfs to big blue blazers, stars of all masses seem to form planets robustly. That's just one item from the latest crop of exoplanet news.
AIC 2009 Videos
Videotaped interviews with vendors at the 2009 Advanced Imaging Conference are now available.
Dark Matter and Dark Energy Update
From the Milky Way's halo to the far reaches of the cosmos, the two dominating components of the universe are revealing more hints about themselves.
See the Stars with Worldwide Eyes
Have you ever wanted to try "virtual observing"? Here's your chance! This weekend you can view fabulous deep-sky objects in both the northern and southern sky by logging on to a special two-day event spearheaded by Astronomers Without Borders
WISE Sees First Light
Scientists unveil the first image from the Wide-field Infrared Survey Explorer satellite, which will map the sky in depth and detail at new wavelengths.
A "Treasure Map" of Millisecond Pulsars
The gamma-ray sky map assembled by the Fermi satellite points the way to finding natural, high-precision "clocks." These could be used in a cosmic GPS-like system to look for flexings of spacetime.
Black-Hole Bonanza
Astronomers announce supermassive double holes, an intermediate-mass hole that seems to have pulled apart a star, fast-spinning holes, and a screaming runaway.
Big News in Epsilon Aurigae Mystery
What's really eclipsing this naked-eye star? Astronomers using the Spitzer Space Telescope think they've finally solved a nearly two-century-old puzzle.
Kepler's First Exoplanet Results
NASA scientists announced this morning that the Kepler planet-hunting probe is working great, has produced a slew of results, and is working at high enough precision that it should be able to determine the abundance, or rarity, of Earth-size worlds galaxy-wide.
Eclipsing in the New Year
Skywatchers in Europe and Asia saw more than fireworks when they looked up on New Year's Eve.
Tour January's Sky! | December 31st, 2009
Midwinter evening skies are alive with celestial activity — after sunset you'll find Jupiter in the southwest, and Orion, Mars, and much more over in the east.Host: S&T's Kelly Beatty. (5.9MB MP3 download: running time: 6m 27s)
Eclipses in 2010
The first year of the new decade features four eclipses, two solars and two lunars. You'll want water wings to see the total solar eclipse on July 11th, which crosses only a few tiny bits of land. December's complete lunar coverup is the first in nearly three years.
