Because it was found to be contradicted by observations when analysed in light of the laws of nature as discovered in the late 1600s. The main point is that the Sun was found to be many times more massive than the planets. The force of gravity on each planet acts equally on the Sun and the planet, but because the Sun is so much more massive it tends to stay in the same place.
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that the world was heliocentric not geocentric aka sun centered universe and earth centered universe
Geocentric theory
Geocentric theory
The Geocentric Theory was developed by Greek astronomers. The theory was that celestial bodies moved around Earth in circular paths.
The heliocentric theory is the idea that planets rotate around the sun, where the geocentric theory said that everything orbited around Earth.