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Two is better than one

New Hubble image of the Twin Jet Nebula highlights the bipolar planetary nebula's shells and its knots of expanding gas in striking detail

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Icy exploration

NASA’s next big spacecraft mission could visit an ice giant

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Sharper scenes

Dawn reveals exciting new views from Ceres

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Uwingu Mars

Name a crater ... make an impact!

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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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Seth Shostak: Life in the universe

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How the space telescope changed the cosmos

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Planetary pebbles

Unraveling the mystery of how Jupiter and Saturn likely formed

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The air up there

LADEE spacecraft finds neon in lunar atmosphere

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Two is better than one

New Hubble image of the Twin Jet Nebula highlights the bipolar planetary nebula's shells and its knots of expanding gas in striking detail

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PICTURE OF THE DAYsee all »

NGC 6791

NGC 6791 is an open star cluster in the constellation Lyra the Harp. This starry beast is one of the oldest open clusters. Astronomers have seen three populations of stars, each at different ages. The youngest group is 4 billion years old, but the cluster also contains collections 6 and 8 billion years old. (3.6-inch Astro-Tech AT90DT refractor at f/6.7, SBIG ST-8300M CCD camera, LRGB image with exposures of 120, 40, 40, and 40 minutes, respectively)
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