SUNSET: 
Nearby Remnant of a Gamma-Ray Burst?
What looks like a supernova remnant on the far side of the Milky Way could be the shattered remains of something bigger.
Seeing the Very First Galaxies
The first stars to light up the universe after the Big Bang did not appear in a simple, expected way.
Amateur Images Venus's Surface
In a first for amateur astronomy, a backyard observer has captured images of the eternally cloud-shrouded surface of Venus.
Astro News Briefs: April 19–25
Second annual National Dark Sky Week celebrated.
Spitzer Exposes Mystery Holes
Taking its deepest-yet look into the infrared sky, the Spitzer Space Telescope pulls some mysterious objects out of hiding.
NASA's O'Keefe Details Hubble Plans
NASA administrator Sean O'Keefe tells the American Astronomical Society that he wants to send a robot, rather than Space Shuttle astronauts, to service the Hubble Space Telescope.
Mysteries of the North Star
Polaris is not only a variable star, its variations are varying. And no one quite knows why.
Asteroids "Sunburn" with Age
A new study shows that the longer some asteroids are exposed to space, the redder their surfaces become.
Bradfield's 18th Comet
Indefatigable comet hunter William Bradfield has found another (his 18th); it's currently visible low in the northeast before sunrise.
The Double Comet Show of 2004
Comets NEAT and LINEAR may reach modest naked-eye brightness in April and May.
Chandra Probes Dark Energy
New X-ray observations have independently confirmed that the universe is dominated by dark energy.
Did an Impact Trigger the "Great Dying"?
Geoscientists think they've found the site of a giant impact off the Australian coast that nearly wiped out life on Earth 251 million years ago.
Young Astronomers Honored
John Davis is seen here with one of his custom-machined German equatorial telescope mounts. Davis won the top prize for the Astronomical League's 2004 National Young Astronomer Award.Courtesy Astronomical League. Each year since 1993 the Astronomical League has recognized outstanding astronomy achievements by US high-school students through its National Young…
Possible New Milky Way Spiral Arm
Radio astronomers may have identified a fifth spiral arm in the outer reaches of our galaxy.
SuperWASP Scrutinizes Swarms of Stars
In a hunt for extrasolar planets, hundreds of thousands of the brightest stars are getting measured precisely many times per night.
The Moon Goes Dark
Europe and Africa are prime viewing areas for the total eclipse of the Moon on May 4—5.
Astro Image in the News:
Opportunity Reaches Endurance Crater
NASA's Mars rover stands poised to make new discoveries.
Astronomy & Observing News
Astro Image in the News:
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Astro Image in the News:
Hubble's Anniversary Ring
The Hubble Space Telescope celebrates 14 years in orbit with a stunning view of a galaxy torn asunder.
Astro Image in the News:
Triple Shadow Transit Movie
A California amateur shot a remarkable sequence recording last March's triple shadow transit on Jupiter.
Mars Rovers Rockin' and Rollin'
One NASA rover sets a distance record while the other heads for the hills.
