The thin, detailed fillaments that interwine to force a complex interplay of base colors are believed to be the surface of an expanding cloud seen edge-on. This is a massive target representing only a portion of the large Cygnus Loop, the remnants of the explosion of a star 20 times more massive than the sun around 15,000 years ago.
The Cygnus Loop is a massive supernova remnant that emits radiation across the full electromagnetic spectrum. The broadband or visible portion is often classified as separate nebulae like NGC6960 ('The Veil Nebula' or the 'Witch's broom') and NGC6962. This is a wide field shot that captures the entire loop over 2 hours of exposure with a narrowband filter.
In the Southern Cross (or Cygnus) where a star no longer glows, Its energy loans the colorful bones that filaments expose / Threads of red and strands of green entangle in their space, The expanding shell of the star that fell and is no longer in its place. The Witch's Broom as some presume is just part of a bigger tale / Of Cirrus clouds, Pickering's Triangle and the Eastern and Western Veil. In space it's stranded the filaments expanded and twisted around the core / That attracts our gaze as we trace the maze, both amazed and grateful yet more.
This beautiful nebula is part of a supernova remnant that spans a large field of view.