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Intermediate measurement

Astronomers have accurately measured — and thus confirmed the existence of — an intermediate-mass black hole.

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Supernova study

Chandra searches for trigger of January supernova in M82

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Rosetta becomes the first spacecraft to rendezvous with a comet

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Fermi finds four novae that produce gamma rays

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Mass map

Mapping the mass within a galaxy cluster more precisely than ever

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Seeing a halo

Hubble reveals an unexpected size and shape to the halo of Centaurus A

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Uwingu Mars

Name a crater ... make an impact!

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Intermediate measurement

Astronomers have accurately measured — and thus confirmed the existence of — an intermediate-mass black hole.

Learn more »

PICTURE OF THE DAYsee all »

Nebulosity around Antares

This image captures the nebulosity around Antares (Alpha Scorpii), the bright star enveloped in the yellow gas below center in this image. Note the beautiful streaks of dark nebulae the photographer captured. (Canon 550D DSLR, Sigma 50mm lens at f/1.4, Astrotrac TT320X-AG mount, 1-hour exposure)
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