This death is so violent and sudden that it sends out a shock wave ... So the supernova explosion lives on as a web of colorful, glowing ribbons in the sky. This is called the Cygnus Loop because ...

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These remnants can be strikingly beautiful and include structures such as the Vela supernova remnant, Cassiopeia A, and the Cygnus Loop. This Hubble image shows the location of a Type II supernova ...