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NGC 7635 Bubble Nebula

The Bubble Nebula is an emission nebula located in the northern constellation Cassiopeia. The nebula lies at a distance of 7,100 to 11,000 light years from Earth. NGC 7635 is located near a large molecular cloud, and lies roughly in the same direction as the open star cluster Messier 52. Refractor William Optics FLT98 (98/618 mm), TeleVue field flattener/reducer 0,8x, Lumicon DeepSky filter, SBIG ST8300 CCD camera, guided on QHY5 , 15x5 minutes exposure.