The Cave Nebula (Sh2-155), is a faint nebula in the Constellation of Cepheus. From Wikipedia: Sh2-155 lies at the edge of the Cepheus B cloud (part of the Cepheus molecular cloud), and is ionized by young stars from the Cep OB3 association. It has been suggested that radiation from the hot O-type star HD 217086 is compressing the region, triggering the formation of a new generation of stars.[9] A study of the region's young stellar objects by the Chandra X-ray Observatory and Spitzer Space Telescope shows a progression of stellar ages in front of the cloud, supporting the hypothesis of triggered star-formation. I've also included a "close up" image of the nebula that shows a little more fine detail.
This image is a stack of 62 x 70s exposures at gain 8 on a Mallincam DS10C camera. NBZ filter; RASA 8 astrograph. Captured in NINA and processed in Siril, Affinity Photo and M'soft Photo.
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