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So much of what we say about Columbus is either wholly untrue or greatly exaggerated. Here are a few of the top offenders. 1. Columbus set out to prove the world was round. If he did, he was about 2,000 years too late. Ancient Greek mathematicians had already proven that the Earth was round, not flat. Pythagoras in the sixth century B.C.E. was one of the originators of the idea.
Galileo's observations of the phases of Venus proved that it  orbited the Sun and lent support to (but did not prove) the  heliocentric model.opernicus was dead so he didn't help him, but he helped prove his theory of heliocentrism. His telescope observations helped to prove the theory that everything revolves arou â¦ nd the sun, instead of the geocentric idea that everything revolved around the Earth.