Copernicus's work was just a mathematical exercise while Galileo said it was fact.
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Galileo Galilei's work on motion and astronomy inspired Isaac Newton to further study and develop the laws of motion and universal gravitation. Newton built upon Galileo's ideas to formulate his own theories that laid the foundation for classical mechanics and our understanding of gravity. Newton acknowledged Galileo as a major influence on his work in the field of physics.
Galileo Galilei did not invent the telescope, but he greatly improved its design and used it for astronomical observations. He faced challenges in convincing others of his discoveries, as they conflicted with prevailing beliefs at the time. Galileo's support for the Copernican heliocentric model of the universe, in contrast to the geocentric model endorsed by the Catholic Church, led to conflict with the Inquisition.