One notable figure would be Nicolaus Copernicus. He would be known for his contributions to Astronomy and the way that we look at our world today. His famous idea that he theorized was that the Sun was at the center of the universe, rather than the Earth. Though there limitations to his heliocentric model, it was a breakthrough of an idea. One of those limitations would be that Copernicus still used a model based on the universe, rather than one based on a solar system. Copernicus’s heliocentric theory sparked further thoughts and experiments of later scientists such as Johannes Kepler. Most considerably, Kepler modified his theory from the use of perfect circles to the use of ellipses, thus solving many issues with Copernicus’s