With a diameter of 170,000 light-years, the pinwheel galaxy is roughly equal to the size of the Milky Way and is located in the constellation of Ursa Major, at a distance of 21 million light years. It’s mass is equal to 100 billion solar masses.
Image acquisition details:
Telescope: Explore Scientific 208mm Newtonian
Camera: Canon Rebel Xs (modified)
Exposure: 41 x 3 minute subs
Date: 17 June 2016