Astronomy Picture of the Day

Introducing Comet Leonard
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Lunar Eclipse over a Skyscraper
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The Sun in X-rays from NuSTAR
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Pleiades: The Seven Sisters Star Cluster
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At the Shadow's Edge
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Great Refractor and Lunar Eclipse
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Messier 101
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A High Cliff on Comet Churyumov-Gerasimenko
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The Extraordinary Spiral in LL Pegasi
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In Motion: Uranus and Moons [video]
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A Blue-Banded Blood Moon
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NGC 6822: Barnard's Galaxy
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