It wasn't a single person who "discovered" that the Earth moves around the Sun. It was a long process involving many individuals and their observations over centuries.

Here's a simplified breakdown:

* Ancient Greeks: Philosophers like Aristarchus of Samos (around 270 BC) were the first to propose a heliocentric model (Sun-centered) of the solar system. He did this based on logical reasoning and observations, but lacked the evidence to prove it.

* Nicolaus Copernicus: In the 16th century, Copernicus revived the heliocentric model with his book "De Revolutionibus Orbium Coelestium" (On the Revolutions of the Heavenly Spheres). He provided detailed mathematical calculations and observations supporting the idea, but his theory was initially met with resistance from the Church.

* Galileo Galilei: In the 17th century, Galileo used his telescope to observe the phases of Venus, which could only be explained if Venus orbited the Sun. He also observed the moons of Jupiter, proving not everything orbited the Earth. His discoveries provided crucial support for the heliocentric model.

* Johannes Kepler: Kepler, a contemporary of Galileo, used detailed observations of Mars to develop his laws of planetary motion, showing that planets orbit the Sun in elliptical paths.

So, it's more accurate to say that the idea of the Earth revolving around the Sun was developed and supported by multiple individuals over a long period. While Aristarchus is credited with the first known heliocentric model, Copernicus's detailed work and Galileo and Kepler's observations are crucial for its acceptance.