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Cluster conundrum

Hubble observations cast further doubt on how globular clusters formed

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Sky Guide 2015

Monthly observing guide to the planets, meteor showers, and more

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Spooky alignment

The rotation axes of a sample of quasars are parallel to each other

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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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Minor planet map

Dawn mission images create geological maps of Vesta

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A Space Experience

Win a trip for four to the Kennedy Space Center Visitor Complex

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Get started in the hobby!

Find your way around the night sky with our app!

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Philae results

Mission scientists share the first data from a comet's surface

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Join Astronomy's Aurora Adventure

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

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Comet coverage

Take a look back at the Philae lander's historic few days

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Uwingu Mars

Name a crater ... make an impact!

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Get Started Tonight!

Sign up for Astronomy's five-part email series, Observing Essentials, and start making the most of every minute under the stars!

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2015 Calendar

View stunning images of stars, galaxies, and deep space wonders.

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Planet formation picture

ALMA reveals new detail in the planet-forming disk around a star

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Cluster conundrum

Hubble observations cast further doubt on how globular clusters formed

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PICTURE OF THE DAYsee all »

The Flame Nebula

The Flame Nebula (NGC 2024) is an emission nebula in the constellation Orion the Hunter. It lies near Alnitak (Zeta Orionis), the easternmost star in the Hunter’s Belt, and by far the brightest star in this image. The Flame Nebula lies some 1,400 light-years away. (10-inch Boren-Simon F/2.8 POWERNEWT Astrograph, SBIG ST-8300M CCD camera, LRGB image with exposures of 35, 6, 6, and 6 minutes, respectively)
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