how did galileo prove copernicus theory
Galileo Galilei. for, and proved Copernicusâ theory. He proved the theory by stating that he saw four moons orbiting Jupiter, which proves that the not everything is orbiting around the Earth, which was the first proof.en Copernicusâ theory was first presented to the world, only a few astronomers took interest into it, but a famous Italian scientist, Galileo Galilei, became devoted to Copernicusâ theory.