How did Kepler law of planetary motion alter the Copernican's system?

Kepler's laws of planetary motion refined the Copernican system by introducing the concept of elliptical orbits, replacing Copernicus's assumption of circular orbits. This shift allowed for a more accurate explanation of planetary movements and their varying speeds. Additionally, Kepler's laws provided a mathematical framework that supported the heliocentric model, enhancing its credibility and paving the way for Newton's law of universal gravitation. Overall, Kepler's work marked a significant advancement in our understanding of celestial mechanics.