This NASA image received July 1, 2009 and created from data obtained from NASA's Chandra X-ray Observatory and the European Southern Observatory's Very Large Telescope, shows a part of the roughly circular supernova remnant known as RCW 86. Astronomers on Wednesday said they had found the farthest supernova ever detected, a giant star that ripped apart around 11 billion years ago.(AFP/NASA/File)
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