How many civilizations lurk in the cosmos?

Fifty years after Frank Drake quantified life in our galaxy, here’s where we stand.

Web extra: Listening for a signal

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.

Web extra: New Horizons at Jupiter

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.

Web extra: Re-tour Galileo’s Italy

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.

Meade’s LightSwitch technology makes observing a snap

This new go-to scope takes the hassle out of setup and offers high-quality optics to boot.


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