Square of Pegasus

English Proper noun Square of Pegasus 1 en asterism The largest asterism of the sky, occurring in the constellation Pegasus. Its corners are Altair (α Peg), Scheat (β Peg), Algenib (γ Peg), and Alpheratz (α And). en 1998 John H. Roger Origins of the ancient constellations: I. The Mesopotamian traditions Journal of the British Astronomy Association 11 1 108 1 "Ea", the beneficent god of earth and life, who dwelt in the abyssal waters, was shown with two streams running from his hands or shoulders; he became Aquarius, and his symbols also formed the constellations of Capricornus (Ea's goat-fish, first seen on the seal of Ur just before 2000 BC), the Field (our Square of Pegasus), Piscis Austrinus, and perhaps Pisces [...] and Aries (Ea's ram's-head staff).