Saturn's moon Enceladus; water geysers and possible life "Stitched together from 21 images captured by NASA's Cassini...

Saturn's moon Enceladus; water geysers and...

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NGC 3603 - glittering stars in a nebulous jewel box Image source: Hubble Space Telescope

NGC 3603 - glittering stars in a nebulous...

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Older sapphire-hued hills and dunes of northern Mars Image credit: NASA/JPL/University of Arizona

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Hyperion - Saturn's strange and spongy-looking moon Image source: NASA's Cassini spacecraft

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Colorful supernova G292.0+1.8 Image credit: NASA/CXC/Penn State/S.Park et al.; Optical: Pal.Obs. DSS

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Centaurus A's Jet-Powered Black Hole at the galaxy's core Image source: Chandra X-Ray Observatory

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High-resolution Phobos - the Martian moon of 'horror' Image credit: NASA/JPL/University of Arizona

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When galaxies collide Image credit: NASA, ESA, the Hubble Heritage Team (STScI/AURA)-ESA/Hubble Collaboration and A....

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Supernova remnant (SN 1006) Image credits: --Image by X-ray: NASA/CXC/Rutgers/G.Cassam-Chenao, J.Hughes et al.; Radio:...

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Star-shaped dunes on Mars Image taken by HiRISE, the high-resolution camera on-board the Mars Reconnaissance Orbiter. ...

Star-shaped dunes on Mars Image taken by...

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NGC 6188 Image credit: MRO/AORAIA member, Don Goldman

NGC 6188 Image credit:...

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~1000 Light-year giant; N44 Image credit: MRO/AORAIA member, Don Goldman

~1000 Light-year giant; N44 ...

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Water Ice on Mars! Note the vanishing evidence - and perhaps the most significant 2-frame GIF ever made: Image...

Water Ice on Mars! Note the vanishing...

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Postcards from Mars - Phoenix Lands at Martian Arctic Site Image credit: NASA/JPL-Caltech/University of Arizona ...

Postcards from Mars - Phoenix Lands at...

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The larger Martian moon Phobos from a distance of about 4200 miles as seen by the High Resolution Imaging Science Experiment (HiRISE)...

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