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The evolution of the supernova remnant Cassiopeia A is shown by combining X-ray images taken by the Chandra X-ray Observatory in January 2000, February 2002, February 2004 and December 2007. Lowest energy X-rays are shown in red, intermediate energies in green and the highest X-ray energies in blue. The explosion’s outer blast wave, moving slower than expected, is also shown in blue.

Posted in 'Evolution, 3-D animation of Cassiopeia A' at sciencenews.org/view/generic/id/39716/title/Evolution%2C_3-D_animation_of_Cassiopeia_A

Credit: D. Patnaude et al., CXC, SAO, NASA

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Science News' Channel

Science News

Science News has been published since 1922. This award-winning biweekly news magazine covers important and emerging research in all fields of science.

Science News publishes concise, accurate, timely articles that appeal to both general readers and


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Science News has been published since 1922. This award-winning biweekly news magazine covers important and emerging research in all fields of science.

Science News publishes concise, accurate, timely articles that appeal to both general readers and scientists, reaching nearly 130,000 subscribers and more than one million readers. Audible.com distributes an audio edition of Science News. News from the Science News reporting team also appears at sciencenews.org. Updated daily, this site covers all areas of science.

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