2,420 lightyears away is "Pickering's Triangle" located in the Cygnus Loop or Veil Nebula. It has no NGC number, but the eastern supernova fragments NGC 6974 and NGC 6979 are also well visible here (left half of the image).

This photo, taken from 282 frames (300 sec) on a 10" f/4 Newton and a ToupTek 26000 Mono, covers an area of just over 50 x 30 light-years. Converted, this means that 1 pixel corresponds to a distance of 3 light-days. That is 540 times the distance between sun and earth or 14 times the distance between sun and Pluto. Even the whole solar system including the Oort cloud fits easily into 1 pixel! It is unbelievable how huge these nebulae are in reality.

The narrow band data is shown in OHS, a rather unusual color palette -> oxygen = red, hydrogen = green, sulfur = blue. Since I'm a big fan of the SII filter, I gave it twice as much exposure time as the OIII filter. This also reveals fine structures in the eastern clouds of NGC 6974 & 6979 in blue/cyan/purple, which apparently emit a lot of ionized sulfur. In between are repeated streaks of ionized oxygen. 

Close to the left edge of the image, in the middle of NGC 6979, you can see with imagination a devilish Japanese dragon: with red dragon head and a blue/white curved serpentine body down to NGC 6974... From today on I call it the "Cygnus Dragon"  Can you spot it?

Interesting are also the sharp green bands (Ha), which can be seen separately only in some places. Mostly the hydrogen overlaps with the other atoms, which leads to these color variations.

Even if it seems chaotic or surreal, the structures are real and come from this unimaginable energy that was discharged during the supernova about 8,000-20,000 years ago. I couldn't find many comparison images to this section in tri-color and high resolution, which may be because there are more prominent regions in the Veil Nebula than this one. That's exactly why I wanted to photograph this area very deeply and as sharply as possible.

The processing steps (not chronological):
PixInsight: Stacking, BXT (medium setting), SXT, Spectrophotometric Color Calibration
Astro Pixel Processor: gradient removal, registration, channel mix
Photoshop 2023: Finetuning

My location: near Marktbreit in Bavaria; mobile telescope on tripod in the garden