How did Galileo prove Copernicus's theory?

Galileo made a number of observations that finally helped convince people that the Sun-centered solar system model (the heliocentric model), as proposed by Copernicus, was correct. read more

Copernicus’ theory was that the Sun, not the Earth, was the centre of the solar system. He made tables that made roughly the same predictions that the old Ptolemaic system, but he could explain the retrograde motion of the planets better than the old system. read more

Galileo Galilei for, and proved Copernicus’ 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. read more

Galileo Galilei, who first incurred the Roman Catholic Church's wrath on March 5, 1616, when he was ordered neither to"hold nor defend" the Copernican theory, did not prove the theory by his observations of satellites circling the planet Jupiter, as you report in"After 350 years, Vatican Says Galileo Was Right: It Moves" (front page, Oct. 31). read more