The Ptolemaic system of the universe with the earth at the center had held sway since antiquity as authoritative in philosophy science and church teaching. Following his observations of the heavenly bodies Nicolaus Copernicus (1473-1543) abandoned the geocentric system for a heliocentric model with the sun at the center. His remarkable work On the Revolutions of Heavenly Spheres stands as one of the greatest intellectual revolutions of all time and profoundly influenced among others Galileo and Sir Isaac Newton.
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