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03/27/2012

Editor's Choice Picture of the Day - March 27, 2012

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MAR27

HO/AFP/Getty Images

This NASA image obtained March 27, 2012 shows wispy tendrils of hot dust and gas glowing in this ultraviolet image of the Cygnus Loop Nebula, taken by NASA‚€™s Galaxy Evolution Explorer. The nebula lies about 1,500 light-years away, and is a supernova remnant, left over from a massive stellar explosion that occurred 5,000-8,000 years ago. The Cygnus Loop extends more than three times the size of the full moon in the night sky, and is tucked next to one of the 'swan‚€™s wings' in the constellation of Cygnus. The filaments of gas and dust visible here in ultraviolet light were heated by the shockwave from the supernova, which is still spreading outward from the original explosion. The original supernova would have been bright enough to be seen clearly from Earth with the naked eye.

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