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These glowing filaments of interstellar gas are part of a larger spherical supernova remnant known as the Cygnus Loop or the Veil Nebula or the Witch's Broom Nebula .
This is a very deep and real image, so the "noise" in background is no noise, these are very very dim stars again.The image is not overprocessed and sharp. See the spikes on the very bright stars.The image processing is made according to scientific rules for long exposed astronomical pictures.