Cassiopeia A CAT scan

NASA/CXC/SAO
January 29, 2015
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NASA/CXC/SAO

A photograph of Cas A from NASA's Chandra X-ray Observatory reveals the supernova remnant's complex structure. In this representative-color image low-energy X-rays are red, medium-energy ones are green, and the highest-energy X-rays detected by Chandra are colored blue. Image credit: NASA/CXC/SAO