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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.
  Copernicus's theory of 1543 places the Sun at the centre instead.  It explains some of the things that the Ptolemaic theory fails to  explain, like the full range of Venus's phases that Galielo  discovered. Galileo reasoned that this must prove that Copernicus's  theory is right.   However Galileo was wrong about this because Tycho Brahe's model  explains the phases of Venus correctly yet still has the Earth at  the centre.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.