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Impact jet

Astronomers have discovered for the first time a rear-end collision between two high-speed knots of ejected matter from a supermassive black hole

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Take the Universe with You!

Nasty behavior

Hubble observes a massive star with an odd nature

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Join Astronomy's Aurora Adventure

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

See the brochure »

Hubble at 25

How the space telescope changed the cosmos

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Spring rings

Saturn is at its 2015 peak, shining brilliantly all night

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

Magnetar mystery

A neutron star is exhibiting some unusual X-ray behavior

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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

View the brochure »

Ends July 24, 2015

Heart of darkness

Astronomers discover new kind of "dark" globular star cluster

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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

Explore now »

Asteroid Day

The truth about the impact threat facing Earth

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Stellar beginnings

The first known example of a globular cluster about to be born

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Impact jet

Astronomers have discovered for the first time a rear-end collision between two high-speed knots of ejected matter from a supermassive black hole

Learn more »

PICTURE OF THE DAYsee all »

ISS transit

This imager pointed his filtered telescope/camera setup at the Sun while the International Space Station was transiting (crossing) its face. (5.2-inch Stellarvue SVA130 EDT refractor at f/7, Fujifilm XT-1 DSLR, ISO 640, eight frames per second, each a 1/4000-second exposure, taken February 20, 2015, at 12:34:51.5 p.m. PST, from Palo Alto Foothills Park)
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