Leo Jul 23 - Aug 22. The three galaxies of the M 66 group are located about 35 million light years from Earth in the constellation Leo. M 65 is the galaxy at the bottom of the photo, while M 66 is on the left and NGC 3628, also known as the Hamburger Galaxy, is on the right. M 65 and M 66 were discovered by Charles Messier in 1780, while NGC 3628 was discovered by William Herschel in 1784.