Deep space object Bubble Nebula (NGC 7635)

Name of this nebula came from it's shape. The "bubble" is created by the stellar wind from a massive hot central star, red color comes from clouds of hydrogen gas. Nebula is located in constellation Cassiopeia, 11 thousand light years away from Earth. Picture taken with newton 750mm f/5 telescope, astrophotography camera and hydrogen filter. Total exposure time: 9 hours.

Image dimensions: 2894 x 1919 pixels