Processing: Data Collection -  N.I.N.A. Sequencer (as FITs).  Sub-frame calibration - Pixinsight (WBPP). Sub-frame  registration and integration (Average combine -   linear fit clipping) - PixInsight (WBPP).    Noise reduction - NoiseXTerminator - PixInsight. Non-linear stretching, normalization and gradient removal - PixInsight. Photometric RGB calibration (SPCC) - PixInsight. Deconvolution of  Lum, Ha, OIII, and RGB stacks (RGB combine) - BlurXTerminator. Generation of starless nebulosity Lum, Ha, OIII , and RGB images for later processing - StarXTerminator.  Curves, Levels, RGB combine - PixInsight.  RGB Stars and starless  combine - PixInsight.   Final finishing  - Affinity Photo.   Annotation - PixInsight, Aladin (Simbad ), and Affinity Photo. This image is a  modified HOO Narrow Band  and screened LRGB starless construction - with RGB stars added.  Image processed at 6248x4176 resolution. Final Image size is approximately  5773x4176.

"Thor's Lightning" is the collection of blue features seen in the image. They are part of a Supernova shell and are OIII emission caused by the expanding energy from the supernova event. The shell distance estimates range from 2,280 to 14,670 light years. The supernova event is estimated to have occurred 38 thousand to 160 thousand years ago. The large red feature is a Hydrogen-Alpha emission as recorded through the Ha exposures. Interestingly enough, there doesn't seem to be any astronomical identification or designation for it. The dark and smoky looking features running generally from upper left to lower right are dark nebulae caused by the obstruction of interstellar material.

 These objects and some of the brighter stars are identified in the annotated image. 

Horizontal FOV is approximately 4.14 degrees. Full size image scale is about 2.58 arcsec/pix. North is at 164 degrees (about 16 degrees shor of a full 180 degree north down orientation).