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Summer shower

The Southern Delta Aquariid meteor shower sparkles in late July

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A must-have app!

Put the universe at your fingertips

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Mass map

Mapping the mass within a galaxy cluster more precisely than ever

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Get started in the hobby!

Find your way around the night sky with our new app!

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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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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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Why Join?

Get more from Astronomy.com!

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Reliving Apollo 11

EXCLUSIVE! How one small step became a giant leap

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GET IT NOW!

Astronomy is available on the App Store!

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Observing Basics

Your Eyes & Observing

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Surprising shape

Nucleus of Rosetta target consists of two separate parts

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Faroe Islands Eclipse

Join Astronomy magazine and MWT Associates, Inc., March 14–23, 2015, as they take in totality from these unspoiled North Atlantic islands. Learn more »

Astronomy on DVD

Explore Astronomy magazine on DVD!

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3-D outburst

The first high-res model of the expanding cloud from Eta Carinae

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Summer shower

The Southern Delta Aquariid meteor shower sparkles in late July

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PICTURE OF THE DAYsee all »

The Dumbbell Nebula

The Dumbbell Nebula (M27) lies in the constellation Vulpecula the Fox. It was the first planetary nebula discovered. French comet hunter Charles Messier found it in 1764. (7.2-inch Telescope Engineering Company TEC-APO180FL refractor at f/5.23, FLI ML-6303 CCD camera, Hydrogen-alpha/Oxygen-III image with six 15-minute exposures through each filter)
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