Who first presented the heliocentric model of the soar system?

The heliocentric model of the solar system, which posits that the Sun is at the center rather than the Earth, was first presented by the ancient Greek philosopher Aristarchus of Samos in the 3rd century BCE. However, it was Nicolaus Copernicus who fully developed and popularized this model in the 16th century, particularly through his work "De revolutionibus orbium coelestium" published in 1543. Copernicus's ideas laid the groundwork for the scientific revolution and transformed our understanding of the cosmos.