a starless version of the Veil Nebula.
The Veil is the visible part of the Cygnus Loop, a massive supernova remnant and radio source around 2,400 light years from Earth. The original star was likely 20x the mass of our Sun and exploded around 10,000 years ago. It has expanded to cover a sky area approximately 36x the area of the full Moon.
There are a lot of stars in the field of view so I used a tool called StarNet++ to remove them and reveal the gases (Hydrogen = Red and Oxygen = Green) more clearly. This is so large that different areas have their own names. The Western Veil (on the right in this view) is called the The Finger of God or The Witches Broom.
