The Veil Nebula Complex

The Veil Nebula is a large supernova remnant in the constellation Cygnus. The source supernova exploded between 10.000 and 20.000 years ago, and the remnants have since expanded to cover an area roughly 3 degrees in diameter (about 6 times the diameter, and 36 times the area, of the full Moon). The distance to the nebula is not precisely known, with estimates ranging from 1,400 to 2,600 light-years.