6,048 results

Solar System

Martian Flare Watch

Sharp-eyed amateurs have an opportunity to observe a rare phenomenon on another planet and help solve a long-standing puzzle.

Pro-Am Collaboration

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.

Astronomy & Observing News

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.

Astronomy & Observing News

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.

Astronomy & Observing News

A Recent Asteroid Crackup

Most asteroids are just pieces of their former selves. Now astronomers have traced back 39 of them to one collision.

Astronomy & Observing News

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.

Astronomy & Observing News

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…

Astronomy & Observing News

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…