Nicolaus Copernicus was an astronomer born in 1473.
He was the first person to formulate a comprehensive heliocentric cosmology, which displaced the Earth from the center of the universe. His heliocentric model, with the sun at the center of the universe, demonstrated that the observed motions of celestial objects can be explained without putting the Earth at rest in the center of the universe.
His book, De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres) is often regarded as the starting point of modern astronomy and the defining epiphany that began the Scientific Revolution.
Among the great polymaths of the Renaissance, Copernicus was a mathematician, astronomer, physician, classical scholar, translator, artist, Catholic cleric, jurist, governor, military leader, diplomat and economist.
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