In 1632, Galileo Galilei published Dialogue Concerning the Two Chief World Systems, a revolutionary book comparing the Copernican (heliocentric) model, where the Earth orbits the Sun, with the Ptolemaic (geocentric) model, which placed Earth at the center of the universe. Presented as a discussion between three characters, the book strongly favored the Copernican theory, defying the Church’s long-held beliefs. This led to Galileo being placed under house arrest, yet his work became a cornerstone of modern astronomy, proving that science and evidence should challenge tradition.
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