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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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Year of Pluto

Revelations of a distant world

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Big eater

M87 has swallowed an entire galaxy in the last billion years

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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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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

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Stellar beginnings

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

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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 »

M12

Globular cluster M12 isn’t one of the go-to globs in the constellation Ophiuchus the Serpent-bearer. Still, as this terrific image shows, it has a lot to offer observers. (20-inch PlaneWave corrected Dall-Kirkham reflector at f/6.8, Apogee U16M CCD camera, LRGB image with exposures of 120, 40, 40, and 40 minutes, respectively)
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