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View Neptune now

Neptune shows up nicely through binoculars and telescopes in late August when it shines brightest against the stars of Aquarius

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Solar safety

How to Safely Observe the Sun

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Construction site

A glimpse of the earliest stages of massive galaxy development

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Experience a once-in-a-lifetime northern lights tour along the Norwegian coast and interior with Astronomy magazine and TravelQuest International.

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Astronomy on DVD

Explore Astronomy magazine on DVD!

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Prepare for landing

Rosetta scientists narrow down locations for comet lander

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Astronomy is available in the app store!

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Moon map

The best-ever global color map of Neptune's strange moon Triton

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Supernova study

Chandra searches for trigger of January supernova in M82

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Starmus 2014 Rocks Astronomy!

Join astronomy’s greatest minds in the Canary Islands, September 22–27, 2014. New speakers continue to be announced!

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Midsize measurement

Confirming the existence of intermediate-mass black holes

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Uwingu Mars

Name a crater ... make an impact!

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View Neptune now

Neptune shows up nicely through binoculars and telescopes in late August when it shines brightest against the stars of Aquarius

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PICTURE OF THE DAYsee all »

Omega Centauri

Omega Centauri (NGC 5139) is the undisputed king of globular clusters. Originally labeled a star, later observers saw its true nature. Today, astronomers tell us that it contains more than 1 million stars. (4-inch Stellarvue SVQ100 refractor, SBIG STL-11000 CCD camera, LRGB image with five 5-minute exposures through each filter)
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