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SH2-91 mosaic with over 50 hours of data

The SH2-91 image, known as the Southern Part of G65.3+5.7, depicted a very faint supernova remnant in Cygnus. Designated SH2-91 or G65.3+5.7, it was a large and complex structure. Franklin Marek decided to create a two-panel HOO mosaic, amassing a total of just over 52 hours between the two panes an...