The famous Cygnus Loop, also known as the Veil Nebula Complex, created by an expanding shockwave resulting from a supernova that exploded approximately 8,000 years ago.

Parts of the Cygnus Loop visible in the image include the Eastern Veil (NGC 6992) on the right, the Western Veil (Witch's Broom) Nebula (NGC 6960) on the left. The faint wisp between the two arcs is Fleming's Triangular Wisp (Pickering's Triangle).
Colour filter 60000 ms exposure
22 Sept 2008 22:57:35 UTC. RA 20:51:11.07 Dec 30:55:11