Astro Anarchy: Milky Way, 12 years, 1250 hours of exposures and 125 x 22 degrees of sky
▻https://astroanarchy.blogspot.com/2021/03/gigapixel-mosaic-of-milky-way-1250.html
It took almost twelve years to finalize this mosaic image. The reason for a long time period is naturally the size of the mosaic and the fact, that image is very deep. Another reason is that I have soht most of the mosaic frames as an individual compositions and publish them as independent artworks. That leads to a kind of complex image set witch is partly overlapping with a lots of unimaged areas between and around frames. I have shot the missing data now and then during the years and last year I was able to publish many sub mosaic images as I got them ready first.
My processing workflow is very constant so very little tweaking was needed between the mosaic frames. Total exposure time is over 1250 hours. Some of the frames has more exposure time, than others. There are some extremely dim objects clearly visible in this composition, like a extremely dim supernova remnant W63, the Cygnus Shell. It lays about six degrees up from North America nebula and it can be seen as a pale blue ring. I spent about 100 hours for this SNR alone. An other large and faint supernova remnant in Cygnus can be seen at near right edge of the image. G65.5+5.7 is as large as more famous Veil nebula. There are over 60 exposure hours for this SNR alone. (Veil SNR is just outside of the mosaic area for compositional reasons but can be seen in “Detail” image above.)
https://1.bp.blogspot.com/-J8Fot06eadk/YFBnQZE_lxI/AAAAAAAAS9Q/ZhC6dEolmVUrsSLvAvl2d0d9MzPIQW8mQCLcBGAsYHQ/w640-h160/AB_MosaicPanels.jpg 
https://1.bp.blogspot.com/-TqRxEAjrDYI/YFCLF-H8K3I/AAAAAAAAS-E/rj_avOwDgw0TP66RQURSDcDIOPPxJIscgCLcBGAsYHQ/w640-h118/000-GrandeMosaic120DegreesLONG.jpg 
https://1.bp.blogspot.com/-o3IUSM3n3YU/YFBtgG8EbKI/AAAAAAAAS90/WWqFWfEHAjQewCla7keKQpcauCf1f7RVACLcBGAsYHQ/w640-h402/000-GrandeMosaic120DDet2.jpg 
https://1.bp.blogspot.com/-hByT1BYuYNA/YFBqlF4VIyI/AAAAAAAAS9c/ajjbe9pxkg05t85U6RUdlf5ldRDsRc_VwCLcBGAsYHQ/w640-h370/000_ABCDEFGHIJK_orientation.jpg 
https://1.bp.blogspot.com/-_0wX_SbN2V0/YFBrGdGEasI/AAAAAAAAS9g/2gW1Ru2d34I66AZMVnqU_N9oHghcGzI1QCLcBGAsYHQ/w640-h232/000-GrandeMosaic120DegreesMAP.jpg 
https://1.bp.blogspot.com/-7RKOSWpSkNU/YFBrUKiwfhI/AAAAAAAAS9k/8_-diUXYZsceZaFXBeW2AZZ6s68a4l3eACLcBGAsYHQ/w640-h580/Mosaic1234_Years.jpg 
