Question

who proposed the heliocentric system? copernicus ptolemy aristotle galileo

Explanation:

The heliocentric system, which places the Sun at the center of the solar - system with planets orbiting around it, was proposed by Nicolaus Copernicus. Ptolemy proposed a geocentric model, Aristotle also supported the geocentric view, and Galileo provided observational evidence for the heliocentric model but did not propose it.

Answer:

A. Copernicus