This Chandra X-ray photograph shows Cassiopeia A, the youngest supernova remnant in the Milky Way. (Photo: NASA/CXC/MIT/UMass Amherst/M.D.Stage et al.)
This Chandra X-ray photograph shows Cassiopeia A, the youngest supernova remnant in the Milky Way. (Photo: NASA/CXC/MIT/UMass Amherst/M.D.Stage et al.)