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Diamond dwarf

A remarkable white dwarf is so cool that its carbon has crystallized, forming, in effect, an Earth-sized diamond in space

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Summer Sweepstakes

WIN a Celestron telescope and more!

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Happy anniversary!

The Curiosity rover marks its first martian year on the Red Planet

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Get started in the hobby!

Find your way around the night sky with our new app!

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Put the universe at your fingertips

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Starbursts solution

Hubble studies star formation bursts in early universe's dwarf galaxies

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Celestron Cosmos Contest

Share what the Cosmos TV series has meant to you, and you could win a Celestron COSMOS 90GT WiFi Telescope!

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Summer observing

Easy-to-find objects in this season's sky

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Charon secrets

Pluto’s moon could once have harbored an underground ocean

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Starmus 2014 Rocks Astronomy!

Join astronomy’s greatest minds in the Canary Islands, September 22–27, 2014. New speakers continue to be announced!

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Dark bursts

Dust absorbing blast’s afterglow causes dark gamma-ray burst

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Astronomy is available on the App Store!

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Come work for Astronomy magazine!

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Uwingu Mars

Name a crater ... make an impact!

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Faroe Islands Eclipse

Join Astronomy magazine and MWT Associates, Inc., March 14–23, 2015, as they take in totality from these unspoiled North Atlantic islands. Learn more »

Diamond dwarf

A remarkable white dwarf is so cool that its carbon has crystallized, forming, in effect, an Earth-sized diamond in space

Learn more »

The Jellyfish Nebula (IC 443) is a supernova remnant in the constellation Gemini the Twins. It lies approximately 5,000 light-years from Earth. (Orion EON 80mm refractor at f/6, Quantum Scientific Imaging QSI-683ws CCD camera, Hydrogen-alpha/RGB image with exposures of 4, 1, 1, and 1 hour, respectively)