Word of the Day
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| Definition: |
Exactly opposite; contrary. |
| Synonyms: |
polar,
opposite
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Gallery
Total pictures in all categories:40
Total number of hits on all pictures:611
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Gods Hand in Space
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Category:
Space as Art
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Author: No Data
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Hits: 93
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Planetary Nebula NGC 2818
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Category:
Space as Art
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Author: NASA
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Hits: 19
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SuperNova Galaxy NGC 1569.jpg
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Category:
Space as Art
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Author: NASA
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Hits: 13
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Galaxy NGC 1569
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Category:
Space as Art
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Author: NASA
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Hits: 13
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Reflection Nebula
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Category:
Space as Art
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Author: NASA
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Hits: 18
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Black Hole Eats Star
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Category:
Space as Art
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Author: NASA
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Hits: 13
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Pipsqueak Solar Flare
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Category:
Space as Art
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Author: NASA
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Hits: 13
Total pictures in all categories:40
Total number of hits on all pictures:611
Version 1.5 RC2, BUILD 20090222
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| A Chameleon Sky |  | | The sands of time are running out for the central star of this the Hourglass Nebula. With its nuclear fuel exhausted, this brief, spectacular, closing phase of a sun-like star's life occurs as its outer layers are ejected and its core becomes a cooling, fading white dwarf. In 1995, astronomers used the Hubble Space Telescope to make a series of images of planetary nebulae, including the one above. Here, delicate rings of colorful glowing gas (nitrogen-red, hydrogen-green, and oxygen-blue) outline the tenuous walls of the 'hourglass.' The unprecedented sharpness of Hubble's images revealed surprising details of the nebula ejection process and may resolve the outstanding mystery of the variety of complex shapes and symmetries of planetary nebulae. Image Credit: NASA, WFPC2, HST, R. Sahai and J. Trauger (JPL)... |
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