Who came up with the helocentric theory?

Answer 1

It was first proposed by Aristarchus of Samos (300 BCE) but it was not until the 16th century, when Nicolaus Copernicus came up with a mathematical model

Answer 2

The heliocentric theory was proposed by the ancient Greek astronomer Aristarchus of Samos around the 3rd century BCE. However, it was popularized by Nicolaus Copernicus in the 16th century with his work "De revolutionibus orbium coelestium" (On the Revolutions of the Celestial Spheres).

Answer 3

The first person known to have suggested a Sun-centered system (there may have been earlier ones, but their names are not recorded in history) was Aristarchus of Samos, about 2400 years ago.