Cygnus Loop Nebula Supernova Remnant NASA Photo Neck Tie
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![Cygnus Loop Nebula Supernova Remnant NASA Photo Neck Tie Cygnus Loop Nebula Supernova Remnant NASA Photo Neck Tie](https://rlv.zcache.com/cygnus_loop_nebula_supernova_remnant_nasa_photo_neck_tie-r86c25b6f7094434c89f82e17e9b8ff02_k4ulm_500.jpg?rlvnet=1)
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Taken by NASA's Galaxy Evolution Explorer, the Cygnus Loop nebula is a supernova remnant 1,500 light-years away, left over from a massive stellar explosion that occurred between 5,000 to 8,000 years ago and would've been bright enough to be seen from Earth.