The idea that the Earth revolves around the Sun, known as heliocentrism, was popularized by the astronomer Nicolaus Copernicus in the 16th century. His work, particularly the book "De revolutionibus orbium coelestium," challenged the prevailing geocentric model, which placed the Earth at the center of the universe. Copernicus's theory laid the groundwork for future astronomers, such as Johannes Kepler and Galileo Galilei, to further develop and support the heliocentric model.
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