M 101, The Pinwheel Galaxy, is a face-on spiral galaxy, 21 million light-years away from earth in the constellation Ursa Major. It is a large galaxy comparable in size to the Milky Way.

Technical info: 
Telescope: TS 80mm f6 APO triplet refractor 
Camera: ZWO ASI 071 MC Pro+ IDAS LPS2 (light pollution) filter 
Exposure: 200x 120sec (Total exposure: ~ 7 hours)

Processed in Astro Pixel Processor and Photoshop CS5