SUNSET: 
A Ghostly Cosmic Pinwheel
Somewhere in Pegasus, a swollen, aging star has begun its death spiral figuratively and literally — throwing off matter that's taken the shape of a delicate yet perfect spiral.
Happy Birthday, John Dobson!
Amateur astronomy's iconic guru of telescope-making turns 95 on September 14th.
S&T's New Single-Issue Magazine
Sky & Telescope has just produced a slim but extremely useful publication.
The Dinosaurs Got a Warning Shot
New research shows that eastern Europe took a hit just 2,000 to 5,000 years before the Big One nearly wiped out life on Earth 65 million years ago.
Tour September's Sky! | August 27th, 2010
Venus clings to the horizon in the west just after sunset, while mighty Jupiter rises in the east. Find out how to spot them — and much more! Host: S&T's Kelly Beatty. (6MB MP3 download: running time: 6m 17s)
Mount Wilson: One Year After the Fire
In August-September 2009, a raging wildfire nearly destroyed Mount Wilson Observatory. But heroic firefighting efforts saved the historic site, and life on the summit is slowly returning to normal.
Two Exoplanets in an Interactive Dance
Two transiting planets of the star Kepler 9 are tugging on each other and swapping orbital energy back and forth. And a third planet may be watching on.
Big Bear's Big New Eye
The "first-light" image from the world's largest solar telescope reveals details in an Earth-size sunspot only 50 miles across.
One Star, Seven Planets
European astronomers had found a bustling solar system in the southern constellation Hydrus: a Sunlike star with at least five and probably seven worlds swarming around it.
Another Flash on Jupiter!
Japanese observer Masayuki Tachikawa appears to have captured another impact on Jupiter, the second one in the past three months.
Jack Horkheimer Passes Away at 72
The airwaves will no longer carry that signature phrase "Keep looking up!", as an iconic figure of amateur astronomy died today at age 72.
The Incredible Shrinking Moon
Planetary scientists have long considered the Moon dead, geologically speaking. But new high-resolution views of the lunar surface argue otherwise.
A New Twist on Dark Energy
Careful observations of the galaxy cluster Abell 1869, so massive that it bends the light from dozens of more distant galaxies, have given cosmologists a powerful new tool in their quest to understand dark energy.
Astro2010: U.S. Astronomy's Crystal Ball
If you had $12 billion to spend on ground- and space-based observatories over the next 10 years, how would decide what to build? A 255-page National Research Council study, just released, provides some answers.
A Runaway Star with a Story To Tell
Now streaking away in the Milky Way's outermost halo, HE 0437-5439 had a very close run-in with the galaxy's central black hole. And that was just the beginning.
Home Computers Dredge Up Weird Pulsar
The Einstein@Home project logs its first discovery, 17,000 light-years away in Vulpecula, through a computer in a couple's basement.
"And the Winner Is..."
Most of us are just casual skygazers. But each year several amateur astronomers are honored for their true passion and dedication at awards ceremonies across the U.S.
Stellafane at its Best
There's star parties and star parties — and then there's Stellafane. Inaugurated in 1926, the Stellafane Convention is probably the longest-running star party in North America, if not the world.
A Lunar Debate: Dry or Wet?
It's been 40 years since Apollo astronauts returned with dusty chunks of the Moon — samples that offer conflicting views of lunar history.
A Solar Tsunami
On August 1st, the Sun let loose with a mighty belch that rippled across its face, sent a torrent of high-energy particles racing into space, and triggered a burst of auroras on Earth.
