The Veil Nebula complex in Cygnus, aka the Cygnus Loop or Cirrus Nebula. This is a remnant of a supernova explosion that occured 5000 to 8000 years ago. It features a mix of red hydrogen-alpha and cyan oxygen III emission for a colourful complex of lacy filaments. The components have the catalogue numbers of NGC 6992-5 (eastern component at left) and NGC 6960 (western component at right, through the star 52 Cygni), and NGC 6974 for the middle area at top called Pickerings Triangle.