The Bubble Nebula, NGC 7635

NGC 7635, also called the Bubble Nebula, Sharpless 162, or Caldwell 11, is a 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 15 ± 5 M_☉ SAO 20575 (BD+60 2522).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. It was discovered in 1787 by William Herschel. The star SAO 20575 or BD+602522 is thought to have a mass of 10-40 Solar masses.


Photograph by Max Freier
Rossington September 2015, from his new Observatory.
20 x 300 sec at ISO 800. 100mm APO telescope, with 0.85 reducer/flattener and Canon 600D astromodified Camera.
Processed with Deep Sky Stacker and Pix in Sight