Two galaxy groups appear next to each other in the constellation Pegasus. Stephan's Quintet, in the lower left, consists of four gravitationally interacting galaxies about 200 million light-years away plus a fifth galaxy about 40 million light-years away. The Deer Lick group, in the upper right, consists of the large spiral galaxy NGC 7331, which is about 50 million light-years away, plus several other smaller-appearing galaxies that are about ten times farther. Several other distant galaxies are scattered across the image. Details of both groups are shown below.
144 minutes L and 120 minutes RGB (binned 2x2) on 2012-11-14 using a QSI 583 from northern New Jersey through an Astro-Physics 155mm refractor at f7.1. North is to the right. ©2012
Stephan's Quintet, detail from the above image. Several tidal tails are visible, including one arching upward from the center of the image. The larger, bluer galaxy just to the left of center is not part of the gravitationally interacting group.
The Deer Lick Galaxy Group, detail from the top image. The largest galaxy is NGC 7331.