The Veil Nebula is part of the Cygnus Loop, a ring-shaped nebula created by a supernova explosion several thousand years ago. The image is composed of several shots and colored.
Photo: NASA / ESA & Z. LYUVAY (STSCI / AURA)
Photo: NASA / ESA & Z. LYUVAY (STSCI / AURA)

I really love this shot.