Nicolaus Copernicus Birthday

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Nicolaus Copernicus was born on 19 February, 1473

Mathematician and astronomer of Polish-German origin whose book On the Revolutions of the Celestial Spheres (original title De revolutionibus orbium coelestium) proposed a model for the universe radically different from the thinking of that day by placing the Sun rather than the Earth at the center. The book was published just before his death and led to the Copernican Revolution. 73 years after its first publication, the book was banned.