NGC7635 Bubble Nebula  
Scope: Deep Sky Instruments RC10c 254mm @ f/7.4 / FL= 1880mm Corrected Ritchey Chretien  
Camera: FLI- ML11002M with FLI (7 position filter wheel CFW-5-7) 
Total Exposure: Ha= 4.0 hr (20min subs x 12) OIII= 2.0 hr (20min subs x 6)
November 2012: Chico, California, USA 
Comments: The NGC 7635, also called the Bubble Nebula,is an H II region emission nebula in the constellation Cassiopeia. It lies close to the direction of the open cluster Messier 52. The "bubble" is created by the stellar wind from a massive hot, 8.7 magnitude young central star. The nebula is near a giant molecular cloud which contains the expansion of the bubble nebula while itself being excited by the hot central star, causing it to glow.