Question

what was the big contribution of kepler to this sun - centered universe idea? hes the one who explained it mathematically he proposed that the path of the planets around the sun swept eliptical, not circular orbits. rewatch

Explanation:

Kepler's major contribution to the heliocentric (sun - centered) universe idea was proposing that the planets' orbits around the sun are elliptical, not circular. This was a significant departure from the previous belief in circular orbits (which was a common assumption in earlier models like Copernicus' heliocentric model, although Copernicus still had some circular - motion - based elements). Kepler's laws of planetary motion, which included the elliptical - orbit law (the first law), provided a more accurate description of planetary motion within the heliocentric framework.

Answer:

He proposed that the path of the planets around the sun swept elliptical, not circular orbits.