Image of the Day: January 2014

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Credit: NASA
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Above: Happy New Year from Cassiopeia A, a supernova remnant that gives Time Square's New Year's ball a run for its money in the beauty department. This colorful image, taken by the Chandra X-Ray Observatory in 2009, shows an exploded star 11,000 light-years away. The green ring surrounding the supernova is from the initial shock wave generated by the explosion; it measures 10 light years in diameter. The bright blue areas are nearly pure iron gas from the hottest part of the star.   Less «
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