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Chandra Views Milky Way Center
The Milky Way's middle appears to be filled with discrete X-ray sources.
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Teaser for partners.
A Little Comet for Southern Hemisphere Observers
Early in 2002, observers living south of the equator will have their chance to see Comet LINEAR (C/2000 WM1).
Meade Sues Celestron Over "Go To" Technology
The February 2000 cover of Sky & Telescope featured a Meade ETX telescope alongside a Celestron NexStar scope. The 'Showdown' headline now seems prophetic. Last week Meade filed a lawsuit against Celestron over patent infringement on the very same telescopes.Sky & Telescope: Craig Michael Utter The long-standing battle between California-based…
Planet Going Up in Smoke
Like a giant comet, the "hot Jupiter" crossing the face of the star HD 209458 is blowing off vast clouds of hydrogen.
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.
Martian Flare Watch
Sharp-eyed amateurs have an opportunity to observe a rare phenomenon on another planet and help solve a long-standing puzzle.
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.
Did a Comet Swarm Kill the Dinosaurs?
New evidence of another 65-million-year-old crater suggests the dinosaurs might have been killed by a 1-2 punch.
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.
A Recent Asteroid Crackup
Most asteroids are just pieces of their former selves. Now astronomers have traced back 39 of them to one collision.
Huge Ice Deposits Found on Mars
A NASA spacecraft has strong evidence that slabs of ice lie buried just below of huge portions of the Martian surface.
Leonid Meteors Roar In On Schedule
Skygazers worldwide got a treat Sunday as the Leonid meteor shower put on its best display in 35 years. This five-image composite by Kazuyuki Tanaka in Japan shows nine Leonids radiating from the Sickle of Leo (center). The Beehive Cluster is at the top. The best meteor shower in 35…
Will Leonids "Storm" for North America?
A 'meteor's-eye view' shows how Earth will be oriented for the first expected peak of the Leonid shower on November 18, 2001, at about 5 a.m. EST (2 a.m. PST). That's when dynamicists predict that Earth will encounter the most dense region of particles released by Comet Tempel-Tuttle. While the…