The Leo Triplet are three interacting galaxies located in the constellation (you guessed it) Leo. They sit approximately 35 million light years away from earth. The three galaxies have all been affected by the gravitational pull from one another. This is evident by the deformed, drawn out spiral arms of "M66" (the galaxy in the middle right) and by the warped, inflated disk of "Hamburger Galaxy" located in the lower left.
This imaged is comprised of 196 exposures for a total integration time of 10 hours.