* Ancient Greeks: Philosophers like Aristarchus of Samos (around 270 BC) proposed a heliocentric model (Sun-centered) based on observations and logic. However, this model was not widely accepted due to the influence of Aristotle and Ptolemy, who championed the geocentric model (Earth-centered).
* Medieval Period: While the geocentric model remained dominant for centuries, some thinkers questioned it. For example, Nicolaus Copernicus (1473-1543) revived the heliocentric idea in his book "De Revolutionibus Orbium Coelestium," but he was hesitant to publish it due to potential backlash from the Church.
* 16th and 17th Centuries: Galileo Galilei (1564-1642) made crucial observations with his telescope, supporting the heliocentric model. He observed the phases of Venus, which could only be explained if Venus orbited the Sun, not Earth. His findings led to conflict with the Church and contributed to the Scientific Revolution.
* Johannes Kepler (1571-1630) further refined the heliocentric model by discovering that planetary orbits are elliptical, not circular. He also formulated laws of planetary motion, which were later explained by Isaac Newton's (1643-1727) theory of gravity.
Therefore, it's inaccurate to say that one person definitively "established" the fact that Earth revolves around the Sun. It was a culmination of observations, theories, and debate over centuries.
The heliocentric model is now widely accepted as the most accurate representation of our solar system, thanks to the contributions of many brilliant minds across history.
