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Zombie stars?

NuSTAR has observed a baffling X-ray glow at the heart of the Milky Way that could involve different classes of stellar corpses

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Take the Universe with You!

Thanks for everything

MESSENGER's Mercury mission is finally complete

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Apollo exclusive

An in-depth interview, including video footage, with astronaut Jim Lovell on his experiences with Apollo 8 and Apollo 13

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Hubble at 25

How the space telescope changed the cosmos

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Stirring signal

Pulsing light may indicate supermassive black hole merger

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Sign Up for Astronomy's five-part Observing Essentials email series!

Getting closer!

New Horizons has captured its first color image of the Pluto system

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Uwingu Mars

Name a crater ... make an impact!

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Indonesian Islands Eclipse

Explore Bali and witness a total solar eclipse in March 2016 with Astronomy magazine and TravelQuest International

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Ends July 24, 2015

Not-so-dark matter?

Dark matter interactions of an unknown nature could be occurring

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Join Astronomy's Aurora Adventure

Experience a once-in-a-lifetime northern lights tour with Astronomy magazine and TravelQuest International

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Asteroid Day

The truth about the impact threat facing Earth

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Infant organics

Complex organic molecules discovered in infant star system

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Zombie stars?

NuSTAR has observed a baffling X-ray glow at the heart of the Milky Way that could involve different classes of stellar corpses

Learn more »

PICTURE OF THE DAYsee all »

Star trails above Gemini

On February 18, 2015, this photographer had the opportunity to be on Mauna Kea, Hawaii, to watch the sunset. He also wanted to take some star-trail pictures and began to look for a suitable foreground object. The Gemini North Telescope had a good view to the north, and looked like it would fill the bill. He took a few exposures to compose the image and was amazed how the sunset made a strong cast of red to illuminate the dome. (Canon 5D Mark III DSLR, telephoto zoom lens set at f/2, ISO 1600, one hundred and eighty 30-second exposures, using a stack of 88)
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