Constellation Pegasus is a prominent constellation in the northern sky, named after the winged horse from Greek mythology. It is best known for its distinctive square shape, often referred to as the "Great Square of Pegasus," which consists of four bright stars: Markab, Scheat, Alpheratz, and Algenib. This constellation is visible in the autumn months and is one of the largest in the sky. It contains several interesting deep-sky objects, including the Andromeda Galaxy and the Triangulum Galaxy, making it a popular area for amateur astronomers to explore.