The Taos Astronomer / Hands-On Observing Sessions and Instruction

Image obtained 11-10-2015 through RVO's Megrez 80mm refractor with Orion field-flattener lens, using a Baader-modified Canon XSi DSLR and BackyardEOS image-acquisition software – 30 (of 33 obtained) carefully selected and stacked 180-second luminance frames combined with multiple dark, flat and bias calibration frames shot at ISO 1600 and totaling more than 200 minutes (~90 minutes effective luminance) were used to create this image; optics driven by the Losmandy G-11 mount equipped with Ovision's precision RA worm gear, guided with an Orion SSG3 Monochrome CCD camera using Maxim DL Pro and post-processed with DeepSkyStacker and Photoshop CS3.

from the web: "The Bubble Nebula (NGC7635) is one of three shells of gas surrounding the massive star BD+602522, the bright star near the center of the bubble. Energetic radiation from the star ionizes the shell, causing it to glow. About six light-years in diameter, the Bubble Nebula is located in the direction of the constellation Cassiopeia."

Please note the red / magenta background throughout this photograph, which is certainly accented by the Canon camera's sensitivity to H-Alpha light. This area of the sky in Cassiopeia is virtually encased in Milky Way nebulosity and is a major area of star creation.