How many civilizations lurk in the cosmos?
Fifty years after Frank Drake quantified life in our galaxy, here’s where we stand.
The SETI Institute and the University of California at Berkeley are using radio dishes to search for life elsewhere in our galaxy.
Secrets of the Kuiper Belt
The frigid edge of our planetary zone has launched a white-hot revolution in understanding the solar system’s origin and evolution.
NASA’s New Horizons spacecraft began its journey to Pluto January 19, 2006. The most vital part of the mission since then occurred in February 2007, when it flew past Jupiter.
Who was Thomas Harriot?
England’s contemporary of Galileo observed the Sun, the Moon, and Jupiter’s satellites through an early telescope.
Experience the life of the great astronomer.
Imaging prehistoric sunrises
With a bit of detective work and graphic manipulation, this astrophotographer visualizes sunrises that prehistoric skywatchers saw.
This new go-to scope takes the hassle out of setup and offers high-quality optics to boot.
This Month in Astronomy
Bob Berman’s Strange Universe
The Sky this Month
Glenn Chaple’s Observing Basics
David H. Levy’s Evening Stars
Stephen James O’Meara’s Secret Sky
The Cosmic Grid