who proposed the heliocentric theory?\no nicolaus copernicus\no galileo galilei\no johannes kepler\no isaac…

Brief Explanations:

The heliocentric theory, which places the Sun at the center of the solar - system with planets orbiting around it, was proposed by Nicolaus Copernicus. Galileo Galilei supported the heliocentric model with his astronomical observations, Johannes Kepler formulated laws of planetary motion based on the heliocentric concept, and Isaac Newton developed the laws of universal gravitation related to the motion of celestial bodies in the heliocentric framework. But the initial proposer was Copernicus.

Answer:

Nicolaus Copernicus