Not far away from the Tulip Nebula (SH2-101:
https://astrob.in/d6ozl9/0/) with the Bow Shockwave from Cyg X-1 (it's the first black hole that could be detected at all) some other very interesting galactic feature can be observed: A Wolf-Rayet star surrounded by a symmetric bubble created by its strong winds. This shows up as a faint blue globe in OIII.
Wikipedia says: A Wolf–Rayet Star, which is a rarely and heterogeneous star with unusual spectra showing prominent broad emission lines of ionised helium and highly ionised nitrogen or carbon. The spectra indicate very high surface enhancement of heavy elements, depletion of hydrogen, and strong stellar winds. The surface temperatures of known Wolf–Rayet stars range from 20,000 K to around 210,000 K, hotter than almost all other kinds of stars.
Highlighting the OIII region was the biggest challenge here. Nevertheless, the bubble embeds itself very nicely into the surrounding H-alpha structures, which lead the eye very pleasingly around the image.
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