The first person to propose that the Earth revolves around the Sun (heliocentric model) was Nicolaus Copernicus in his book "De Revolutionibus Orbium Coelestium" (On the Revolutions of the Heavenly Spheres) published in 1543.

However, the idea of a heliocentric model had been proposed by other Greek astronomers before Copernicus, most notably Aristarchus of Samos in the 3rd century BC. But Copernicus provided the first detailed mathematical model of the solar system that supported the heliocentric theory.

It's important to note that Copernicus's theory was not universally accepted at the time and faced strong opposition from the Church, which supported the geocentric model (Earth at the center) proposed by Ptolemy. It took centuries for the heliocentric theory to become widely accepted.