He was a Polish mathematician who disagreed with Ptolemy's view that the earth is the center of the universe. The heliocentric theory is the theory that the sun is the center of the universe, not the earth.
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Nicolaus Copernicus
Copernicus
No, Copernicus was Polish. Nicolaus Copernicus was an astronomer and mathematician who formulated the heliocentric model of the universe. He was born in 1473 in the Kingdom of Poland.
Aristarchus of Samos
Ptolemy proposed a geocentric model, with Earth at the center and planets orbiting it. Copernicus suggested a heliocentric model, with the Sun at the center of the solar system. Galileo's telescopic observations supported the heliocentric model and provided evidence for Copernicus' theory.