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Pegasus is one of the northern constellations, located southwest of Andromeda and north of Aquarius. The most prominent feature of the star map of Pegasus is its α、β、γ The Three Stars and Andromeda α

The stars form an almost square shape, which is called the "autumn quadrilateral.". The large quadrilateral of Pegasus is the most dazzling star in the northern sky of autumn. These four stars are divided by γ Stars are of third order, while others are of second order, so this quadrilateral is very eye-catching in the autumn sky without many bright stars.