NGC 7331 (also known as Caldwell 30) is a spiral galaxy about 40 megalight-years away in the constellation Pegasus it is a part of several group of Galaxies (seen at upper Right).
It was discovered by William Herschel in 1784.
The galaxy is similar in size and structure to the galaxy we inhabit, and is often referred to as "the Milky Way's twin"

Stephan's Quintet in the constellation Pegasus is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. (Seen at lower Left)
The group was discovered by Édouard Stephan in 1877 at Marseilles Observatory. (Wiki)

Imaged with the 16" f3.75 Dream Astrograph.
Apogee Alta U-16M camera.

Luminance for 3:00 HRS (BIN 1)

RGB 30 min per channel

Total of 4:30 hrs

Imaged from Tivoli farm in Namibia May 2015.