This is the galaxy called M94, located about 16 million light years from Earth in the direction of the constellation Canes Venatici.

If your monitor is reasonably well calibrated and you look carefully, you can see a faint outer disk surrounding the bright inner disk of the galaxy in this image. The nature and cause of this outer disk is debated among scientists, with theories ranging from interactions with external star masses to forces within M94 itself. When French astronomer Charles Messier observed and cataloged M94 in 1781, he could not have seen this outer disk with his relatively crude telescope.

This image was created from 69 frames totalling 90 minutes taken with the ASI071MC Pro camera attached to an 8" newtonian reflector telescope.