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An organically grown planet definition

In an Astronomy magazine exclusive, planetary scientists Kirby Runyon and Alan Stern ask an important question: Should we really define a word by voting? Read more >>>
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Remembering Stephen Hawking

Astronomy editor David Eicher remembers the great physicist in words, and the Starmus Advisory Board shares a short video tribute.

Losing the Nobel Prize

Author Brian Keating discusses his book and its themes with Astronomy. Read more >>>

Table for one?

The Fermi Paradox attempts to settle the issue of our apparent aloneness in the universe. Read more >>>
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Wandering star shook up the solar system

70,000 years ago, a nomadic star came within a light-year of the Sun, likely sending dozens of comets and asteroids tumbling from the solar system. Read more >>>
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One Strange Rock will change the way you see the planet

National Geographic’s new 10-part series, airing now, presents Earth as a fascinating, vibrant, and living place, from the unique perspective of those few who have left its surface. Read more >>>

Swift Mercury

Mercury hangs bright in the evening sky! Learn more about this tiny planet now. Read more >>>

Mysterious Venus

It's easy to explore the second planet from the Sun with web content on our sister world. Read more >>>
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How does space change the human body?

NASA’s Twins Study sent one identical twin to space for a year, while the other stayed on Earth. Ten separate research projects then tracked how their bodies changed. Read More >>>

Hubble reboots Messier Catalog

New images added to Hubble Messier Catalog

What is dead may never die

Bizarre "zombie" star went supernova not once, but twice.
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Our Milky Way

Astronomy magazine and artist Jon Lomberg highlight our home galaxy: the Milky Way. Learn more >>>
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Centaurus A’s satellites rotate together

New observations confirm what astronomers have seen elsewhere … and challenge current dark matter models. Read more >>>

A disant galaxy at high power

This strangely dormant galaxy is magnified 30x. Read more >>>

A possible slew of extragalactic exoplanets

Rogue planets explain a strange observation. Learn more >>>
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Explorer 1: The start of the American Space Age

January 31 marks the 60th anniversary of Explorer 1, America's first satellite, which ushered the United States into the Space Race. Read More >>>

June 30-July 10, 2019

Enjoy spectacular eclipse viewing, Machu Picchu, and much more on this 11-day journey.
Learn more >>

October 3-13, 2018

Enjoy 8 full nights of relaxed aurora viewing surrounded by breathtaking natural beauty.
Learn more >>
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Read our blog

Astronomy magazine editors share their unique insight from behind the scenes of the science, hobby, and magazine. Read more >>>
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New pulsar result supports particle dark matter

The nature of dark matter remains elusive, but astronomers are now one step closer to the answer. Read more >>>

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Looking for a telescope?

Let Celestron and Astronomy help you find your ideal first or next telescope in this free digital supplement. Get it here >>>

See the comet's shape and surface features.

Get a FREE GIFT when you subscribe!

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What do belts around Proxima Centauri mean for exoplanet research?

Astronomy has a Q&A with Guillem Anglada-Escude, one of the discoverers of the nearest exoplanet to us. Read more >>>
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LIGO detects a neutron star merger

Astronomers have just caught gravitational waves - and more - from a pair of merging neutron stars. Read more >>>
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Get the answers to your Laser SETI questions

Check out our guest blog by a SETI scientist, with the answers to your questions about the search for extraterrestrial life. Read more >>>
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The Real Reality Show

Join our editor-in-chief David Eicher on an expedition through the heart of science headlines. Read More >>>
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Check out our long-form features!

When big news happens or a huge story needs to be told, it's time to dig deep. Read more >>>
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Space missions that dodged disaster

Some of our most successful spacecraft almost weren't. Read more >>>

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Exclusively from Astronomy magazine.

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The Milky Way

An organically grown planet definition

In an Astronomy magazine exclusive, planetary scientists Kirby Runyon and Alan Stern ask an important question: Should we really define a word by voting? Read more >>>
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