the geocentric theory! it was opposed by the theory that the sun was the center of the universe, called the heliocentric theory. hope i helped! (:
Nicolaus Copernicus was born in the Kingdom of Poland on February 19, 1473. He was the first to formulate a comprehensive Heliocentric Cosmology , which displaced the Earth from the center of the universe. He died on May 24, 1543 in the Kingdom of Poland.
Copernicus created the mathematical theory to prove that the Sun, not the Earth, was the centre of our solar system. Galilei provided the calculations and observations to prove Copernicus' theory.
copernicus coined the heliocentric theory...
Copernicus discovered the heliocentric theory in 1510 and worked on it for four more years.
Copernicus is the author of the heliocentric theory.
Galileo supported Copernicus's heliocentric theory
The heliocentric theory was first proposed by Nicolaus Copernicus.