NGC 7635 is commonly known as the Bubble Nebula. It is in the constellation of Cassiopeia. It is a rare example of a planetary nebula which is illuminated by a very hot OB type star.

200mm F5 Newtonian telescope on a EQ 5 mount. Starlight Xpress MX716 CCD camera

23x25 seconds exposures. Processed with Starlight Xpress software and astromix.