After the release of the cosmic background radiation, darkness fell over the universe.
Color is the key to understanding asteroid family histories.
Supernova aftermath illustrated
A supernova’s impact lives on long beyond its fading light.
Planetary scientists S. Alan Stern and Hal Weaver take us inside the search for new worlds.
Pluto’s three satellites, like Earth’s Moon, may have formed from a giant collision.
The sky inspired Egyptians in science, art, and architecture.
Tour summer’s great globulars
Sure they’re all round, but each globular cluster offers a different view through a telescope.
All hail the king
This guide will help you get the most from observing Jupiter at its best.
Relive the Red Planet’s big show
Astroimagers captured their best views of Mars this past year.
Vixen’s go-anywhere scope
This lightweight refractor combines optical and mechanical excellence, portability, and ease of use.
This month in Astronomy
Bob Berman’s strange universe
Glenn Chaple’s observing basics
Phil Harrington’s binocular universe
The Big Dipper, part two
The sky this month