SUNSET: 
Hubble in Limbo
NASA would like to keep the famous telescope alive, but it needs the Space Shuttle to do it.
For Hubble, the End Is in Sight
Looking ahead to the James Webb Space Telescope, astronomers and NASA managers are fiercely debating how and when to end the mission of its illustrious predecessor.
Exoplanet Baby Boom
Planets may be more common in the galaxy today than in times past, when stars contained fewer heavy elements.
Sun Acts Up Again
Two large sunspot groups are visible on the Sun's face. One is flaring wildly, and the other looks like it's about to do the same.
Light Pollution Goes Mainstream
A major gathering in Boston, Massachusetts, demonstrates that astronomers aren't the only ones with good reasons to preserve the dark night sky.
Naked-Eye Sunspot
A giant spot complex is crossing the Sun's face this week. You can see it with a safe solar filter — with or without a telescope.
Celestron Reborn
Its parent company is liquidating its assets, and its chief competitor is taking it to court, but telescope manufacturer Celestron has new owners and a new lease on life.
Hubble's New Camera: Picture Perfect
Astronomers are delighted with the first images from the Hubble Space Telescope's Advanced Camera for Surveys.
New Hubble Images on the Way
On Tuesday, April 30th, NASA will release the first images from the Advanced Camera for Surveys, which was installed on the Hubble Space Telescope in early March.
Hubble Upgrade Complete
With 5 space walks in 5 days, astronauts aboard the shuttle Columbia have given the aging Hubble Space Telescope a new lease on life.
Lord of the Rings
The world's largest telescope snaps what is arguably the best ground-based image ever made of Saturn's rings.
Results of Nearby-Supernova AstroAlert Test
Our February 2003 AstroAlert test went very well. Here we report on what we learned, thanks to the enthusiasm and dedication of the test's participants.
TEST - Possible Galactic Supernova!
In February 2003, Sky & Telescope and the SuperNova Early Warning System (SNEWS) conducted a test of the AstroAlert system. Here's what it looked like.
Our Stormy Sun
As one naked-eye sunspot group rotates off the disk, another swings into view to take its place. Both active regions continue to spawn flares and other energetic explosions.