Nebulae
NGC 7635 Bubble Nebula in Cassiopeia
This lies 7,000-11,000 lightyears away and is around 7 lightyears in diameter. The bubble is actually a shockwave formed by the stellar wind from a star with about 45x the mass of the sun. It is the bright star at around 11 o'clock within the bubble, towards the upper left. The bubble's asymmetry is the result of differences in the density of the surrounding molecular cloud.
This image is the result of exactly 10 hours of data capture, over four evenings in September 2020.
ZWO ASI071 MC Pro camera through an 8-inch Teleskop-Service Ritchey-Chretien reflector.
Date: 20/09/2020
Photographer: Graham Wilcock
