Great Astronomers

Nicolaus Copernicus (1473-1543) was a mathematician and astronomer who formulated a comprehensive heliocentric model which placed the Sun, rather than the Earth, at the center of the universe, contrary to the prevailing thought at his time which placed the Earth at the center. The publication of Copernicus' book, De revolutionibus orbium coelestium (On the Revolutions of the Celestial Spheres), just before his death in 1543, is considered a major event in the history of science.