The Cygnus Loop Nebula is characterized by having an arched, shell-like appearance. The Cygnus Loop is a

Name: The Cygnus Loop Nebula is characterized by having an arched, shell-like appearance. The Cygnus Loop is a
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The Cygnus Loop Nebula is a supernova remnant, which means it is the remains of a star that exploded in a supernova event. Its arched, shell-like appearance is due to the shock waves from the supernova explosion sweeping up the surrounding interstellar medium.

The Cygnus Loop Nebula Is Characterized by Having an Arched