Features

Demise of the Dinosaurs – A Mystery Solved?

If the dinosaurs were killed off by an asteroid, where did it hit? Planetary scientists think they have found the site.

Is Cosmology a Sometime Thing?

We may be livng during the only time in the history of the universe when it is possible to learn about that history.

An Eye on the Violent Universe

The Gamma Ray Observatory is now orbiting Earth on a mission to probe the high-energy radiation from quasars, black holes, and exploding stars.

Departments

Behind the Scenes
Letters
Viewpoint
AstroNews
Space News
Amateur News
Reader Reports
New Astronomy Products
Product Reviews
Astronomy Books
Meetings and Events
Readings and Resources
Credits
Advertiser Index