Where is the universe heading?
To find out how it all ends, scientists need to understand what makes up the universe.
This story is the 2007 winner of the American Institute of Physics’ Science Writing Award for a Scientist. You can read this story here.
To answer big questions, scientists need to think big about their observing tools.
Cassini unveils Saturn
Nearly 2 years into its extraordinary mission, NASA’s Cassini spacecraft reveals the ringed planet’s secrets.
The Cassini mission has already delivered fantastic images and groundbreaking science. Here’s what’s planned for its second act.
Witness to cosmic collisions
NASA’s Swift mission has helped astronomers solve the 35-year-old mystery of what causes short gamma-ray bursts.
Since the 1960s, various spacecraft have contributed to the current body of gamma-ray burst knowledge.
Spiders from Mars
Dark, branching patterns on Mars’ south pole link the planet’s climate to its most prominent landforms.
Spiders are just one of many strange landforms at the martian south pole.
Discover great nebulae in Cygnus
Glowing gas and dark dust mingle in spectacular ways among the Swan’s star clouds.
Enjoy a variety of stunning nebulae in Cygnus.
A southern-sky Messier Catalog
From south of the equator, you can observer 152 Bennett objects as impressive as the best in the north.
Use this printable list to target some spectacular celestial objects.
Solar eclipse trips
Astronomy editors view the Sun’s corona from two Mediterranean locations.
See the sites from Astronomy’s tour of the Mediterranean while chasing the March 29 eclipse.
Designed to shoot the sky
Canon’s EOS 20Da camera sets a new standard for astrophotography.
This month in Astronomy
Bob Berman’s strange universe
Glenn Chaple’s observing basics
Phil Harrington’s binocular universe
The sky this month