While his ideas were not widely accepted at the time, he proposed a heliocentric model, where the Sun was the center of the solar system and the Earth revolved around it.
However, it's important to note that:
* Ancient Greek philosophers like Philolaus (5th century BC) had already proposed the idea of a central fire, not the Earth, but their models were not widely accepted.
* Aristarchus's model lacked strong observational evidence and was overshadowed by the prevailing geocentric model proposed by Aristotle and later further developed by Ptolemy.
Ultimately, it was Nicolaus Copernicus in the 16th century who revived the heliocentric model, providing more compelling evidence and ushering in a new era of astronomy.
So, while Aristarchus was the first to propose a heliocentric model, it was Copernicus who truly challenged the geocentric model and laid the foundation for modern astronomy.
