Image Description and Details :

Discovered by the German astronomer Johann Elert Bode in 1774, M81 is one of the brightest galaxies in the night sky. It is located 11.6 million light-years from Earth in the constellation Ursa Major and has an apparent magnitude of 6.9.
This Image was captured over two winters with 4 different telescopes spanning from 8" to 12" for a total of 17 hours of exposure using LRGBHa Filters and a monochrome camera.

Copyright: Matthew Proulx