NGC 7331 is a spiral galaxy about 40 million light-years away in the constellation Pegasus. It was discovered by William Herschel in 1784. NGC 7331 is the brightest member of Deer Lick Group of galaxies.
The galaxy is similar in size and structure to the galaxy we inhabit, and is often referred to as "the Milky Way's twin," although recent discoveries regarding the structure of the Milky Way may call this similarity into doubt.
