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A Meteor and the Gegenschein
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In Loving Memory of Carl Sagan
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Orion Rising over Brazil
The next few months will be the best for seeing this familiar constellation as it rises continually earlier in the night.
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Ares 3 Landing Site: The Martian Revisited
This close-up was taken from the Mars Reconnaissance Orbiter's HiRISE camera.
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A Triangular Shadow of a Large Volcano
Why does the shadow of this volcano look like a triangle?
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Astronomy Picture of the Day: December's Comet Wirtanen
Coming close in mid-December, Comet 46P Wirtanen hangs in this starry sky over the bell tower of a Romanesque church.
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Astronomy Picture of the Day: Comet, Heart and Soul
The greenish coma of comet 21P/Giacobini-Zinner stands out at the left of this telephoto skyscape spanning over 10 degrees toward the northern constellations Cassiopeia and Perseus.
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Astronomy Picture of the Day: Galaxy in a Crystal Ball
A small crystal ball seems to hold a whole galaxy in this creative snapshot.
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Astronomy Picture of the Day: The Observable Universe
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Astronomy Picture of the Day: Wanderers
How far out will humanity explore?
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