This cosmic bubble is one of the more unusual structures, I found on my journey across the constellation of Cygnus. July and August 2016. I suspect this is the delicate imprint of an ancient supernova at work. This structure may well be a new discovery as I can find no reference to it existence anywhere. Any Planetary Nebula experts out there, please chime in. 🙂
It is visible only in the OIII band and extremely faint.
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