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Fitful reawakening

V404 Cygni, a system comprising a black hole and a star, has made its comeback to the cosmic stage in bursts of X-rays and gamma rays

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Impact awareness

Find out how you can participate in Asteroid Day activites

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Big eater

M87 has swallowed an entire galaxy in the last billion years

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

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Hubble at 25

How the space telescope changed the cosmos

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Two for one

Simulation suggests black holes may make ideal dark matter labs

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

Venus volcanism

Evidence of hot lava flows discovered on Venus

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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

Stellar beginnings

Best observational evidence of the universe's first-generation stars

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Exclusive podcast series

Editor David J. Eicher conducts extensive interviews with the world's top astrophysicists, planetary scientists, and cosmologists

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Get timely coverage of the heavens above

Hello, Philae!

Rosetta's lander wakes up from hibernation on Comet 67P

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Fitful reawakening

V404 Cygni, a system comprising a black hole and a star, has made its comeback to the cosmic stage in bursts of X-rays and gamma rays

Learn more »

PICTURE OF THE DAYsee all »

M101

Spiral galaxy M101 in the constellation Ursa Major the Great Bear was one of the first objects cataloged as a “spiral nebula.” William Parsons, the Third Earl of Rosse, put this object in his second list of spiral or curvilinear nebulae, in 1851. (12-inch Astronomy Technologies Astro-Tech Ritchey-Chrétien astrograph with an Astro-Physics 2.7 focal reducer for f/6, QHYCCD QHY12 CCD camera, RGB image with 250 minutes of exposures, stacked)
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