You've made Barnard's Loop very real. Impressively deep. First images I saw of it (long time ago, film) it required "averted imagination" to see it.
It was fun hunting around and identifying horsehead, flame, etc.
Tough decision as to whether to let those things burn out, so as to give a feel for how very faint the loop is (nobody would call the horsehead's nebula bright), or whether, as you've chosen, to make it more of a map or diagram, with the attendant inevitable posterization, but where staggeringly bright and staggeringly dim can both be seen in the one image. A successful technical adventure.
Cheers,
Mike
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