Stephan's Quintet is a group of five galaxies located in the constellation Pegasus. It was first discovered in 1877 by the French astronomer Édouard Stephan. The galaxies are interacting with each other, creating a dynamic and visually striking formation. The five galaxies in Stephan's Quintet are designated as NGC 7317, NGC 7318A, NGC 7318B, NGC 7319, and NGC 7320. This group is notable for its gravitational interactions, which can lead to star formation and other cosmic phenomena. Stephan's Quintet is often studied to understand galaxy evolution and the effects of galactic collisions.