This image provided by NASA Wednesday Dec. 30, 2009 shows a view combining infrared images from the ground (red, green) with X-ray data from NASA's Chandra X-Ray Observatory in the supernova remnant W49B. Studies of two supernova remnants using the Japan-U.S. Suzaku observatory have revealed never-before-seen embers of the high-temperature fireballs that immediately followed the explosions. Even after thousands of years, gas within these stellar wrecks retain the imprint of temperatures 10,000 times hotter than the sun's surface. Suzaku found another fossil fireball. It detected X-rays produced when heavily ionized iron atoms recapture an electron.(AP Photo/NASA)
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