SUNSET: 
Site Picked for Giant Magellan Telescope
Another truly monster telescope of the future has just taken a step closer to reality.
There Might Be Supergiants
A new view from the Hubble Space Telescope reveals the goings on in a cluster full of massive stars.
Sun 1, Comet Tail 0
A solar explosion plows into a comet's tail. Care to place a wager on which one wins?
Refining Hipparcos's Star Distances
To extract even better star distances, a Cambridge astronomer who took part in the Hipparcos mission has just completed a whole new analysis of the raw data.
Follow that Station!
Our renewed online tool will let you follow humans orbiting Earth.
Uranian Moons Transit Tonight
This evening, if you've got a good planetary imaging setup, see if you can rcord the shadows of Titania and Ariel as they drift across the cloud tops of Uranus.
Listen to October's Podcast
Fact: the "Summer Triangle" is easiest to see at this time of year. Learn all about it — and lots more — in our easy-on-the-ears guided tour of the October evening sky.
Hi-Def from Space
A Moon-bound spacecraft looks back to shoot Earth in high-definition glory.
New Stars in a Galaxy's Wake
More than 200 million light-years away, a galaxy is shedding gas as it moves. Surprisingly, stars have popped up in the material left behind.
Skylights into Martian Caves
NASA's Mars Odyssey orbiter may have found deep black pits — possibly sinkholes — that act as skylights for extensive caves on the slopes of the volcano Arsia Mons.
Thomas M. Back (1957–2007)
The astronomical community was saddened to learn of the recent death of Thomas M. Back, whose name is associated with some of today's finest telescopes and eyepieces.
Mystery Pulse from Outer Space
Six years ago a radio telescope in Australia recorded a mysterious radio burst that lasted only a tiny fraction of a second and reached Earth from more than a billion light-years away. Astronomers have no idea what caused it.
Dawn Heads to Vesta (Finally!)
After many delays (and near termination), NASA's ambitious asteroid mission is finally under way following a picture-perfect launch on Thursday.
A Hot New Comet
The Solar and Heliospheric Observatory has 1,350 comet discoveries to its credit. But only one of them has been a repeat visitor.
Let's Count Stars!
Researchers want you to help them examine the pervasiveness of light pollution during October.
An Occultation by Pluto's Moon Charon?
New calculations indicate that Charon may actually occult an 8.7-magnitude star on Sept. 27, 2007.
Occultations by Possible Rings of Pluto This Week
Pluto will pass extremely close to an 8.7-magnitude star on September 27, 2007; observers should monitor the star's brightness electronically.
Nominations Sought for Amateur Award
The American Astronomical Society (AAS) is now accepting nominations for the Chambliss Amateur Achievement Award.
A Galaxy with the Wrong Shape
A newly discovered dwarf galaxy in Hercules isn't like the millions of other "dwarf spheroidals" known in the universe. It's cigar shaped.
