What is the heliocentric theory?

Question

Violet Adams · Accepted Answer

The heliocentric theory is/was the theory that the sun is the center of the universe.

The word "helios" in Greek means "sun." The geocentric theory, which regarded the earth ("geo") as the universe's center, was superseded by the heliocentric theory. Although the heliocentric model is no longer recognized as a functional model for the universe, it is still frequently used when applied only to our solar system.

Mason Allen · Answer

undefined The heliocentric theory proposes that the Sun is at the center of the solar system, with the planets, including Earth, orbiting around it. This theory contrasts with the earlier geocentric model, which posited that Earth was the center of the universe, with the Sun and other celestial bodies orbiting around it. The heliocentric theory was notably championed by Nicolaus Copernicus in the 16th century and later expanded upon by astronomers such as Johannes Kepler and Galileo Galilei.