The hot, violent world of galaxy clusters
It’s a muddle in the middle. The gas in the center of galaxy clusters isn’t as cool as expected. Something is heating it, but what?
Every 11 years, the Sun’s magnetic field bottoms out, reverses, and rebuilds. Scientists are beginning to understand why.
Can astronomers learn the origin and fate of the universe by examining stars next door?
The universe has spawned galaxies in many shapes and sizes, and backyard scopes let you sample all types of them.
Fireworks on the Fourth
On July 4, Deep Impact will blow a hole in Comet Tempel 1. Don’t miss it.
A veteran astrophotographer captures the cosmos with Canon’s Digital Rebel.
Fifteen things you need to know before buying a telescope.
Easy imaging for everyone
Meade’s Deep Sky Imager slashes the cost of skyshooting and makes photographing the night sky a snap.
This month in Astronomy
Bob Berman’s strange universe
Glenn Chaple’s observing basics
Phil Harrington’s binocular universe
Star clusters heat up
The sky this month