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Fruitful flyby

NASA's three Mars orbiters safely study Comet Siding Spring flyby

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Witness a partial solar eclipse October 23!

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Indonesian Islands Eclipse

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Lunar development

Strong evidence that the Moon’s volcanic activity slowed gradually

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Extreme energy

A pulsar in M82 beams with the energy of about 10 million Suns

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Name a crater ... make an impact!

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Active area

Rosetta captures a region of jet activity the neck of Comet 67P

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Astro 101: Cosmic Rays

Subatomic particles with ridiculous amounts of energy

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Super star

Swift mission observes mega flares from a mini star

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Fruitful flyby

NASA's three Mars orbiters safely study Comet Siding Spring flyby

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PICTURE OF THE DAYsee all »

IC 63

This combination color/Hubble palette image of emission nebula IC 63 required an amazing 16.5 hours of exposures. IC 63 lies in the constellation Cassiopeia the Queen about 600 light-years from Earth. (4-inch Takahashi FSQ-106 refractor, SBIG STL-11000 CCD camera, Hydrogen-alpha/Oxygen-III/Sulfur-II/LRGB image with exposures of 300, 390, 160, 50, 30, 30, and 30 minutes, respectively)
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