This shows the entire Cygnus Loop of supernova remnants.
139 x 90 sec frames (3.5 hrs) using a Canon T2i DSLR unguided on a Takahashi EM010 mount. Taken from Cherry Springs State Park. Stacked in DeepSkyStacker, DDP stretched in CCDStack, Levels and high pass filters applied in PhotoShop.
- Steve Walters