NGC-7635, commonly called The Bubble Nebula is an H II emission nebula located in the constellation of Cassiopiea, less than 1 degree from the open star cluster Messier 52. The "bubble" formation is created by the stellar wind from a massive, hot young star, SAO-20575. This bubble is contained within a giant molecular cloud, which is also excited by this star, causing it to glow in the wavelength of ionized hydrogen. NGC-7635 lies 11,000 light years from Earth. The bubble itself is 8 to 10 light years in diameter. NGC-7635 was discovered by Sir William Herschel in 1787.
This image, acquired on October 17,2023, is a 2 hour 34 minute integration of 2 minute exposures through the Celestron C-11 at f/6.3, using the Starizona Reducer/Corrector 6.3 and the ZWO ASI2600MC Pro camera, operating at -10 degrees below ambient temperature and binned 1 X 1. Guided and captured using N.I.N.A (Nightime Imaging 'N' Astronomy). Stacked and color balanced using Maxim DL5. Post processed using PhotoShop CS2, Gradient XTerminator, StarShrink, Carboni's Astro Tools, Deep Sky Colors and NoiseWare