Whirlpool galaxy
This is the area around M51 - the Wirlpool galaxy. It's really a pair of galaxies that are interacting by their gravitational forces. There are a lot of background galaxies. Go ahead, zoom in.br/br/Technical details: Baader modded Canon XSi, Canon 200 mm f2.8L @ f3.4 (58mm external aperture), 24x4min (dithered manually), 100+ darks, 38 flats.