What scientist studied the planets and discovered something new about the planets in the renaissance?

During the Renaissance, Johannes Kepler made significant contributions to the study of planets. He formulated the three laws of planetary motion, which described how planets orbit the sun in elliptical paths rather than circular ones. This discovery challenged the long-held geocentric model and laid the groundwork for modern astronomy, influencing figures like Isaac newton. Kepler's work marked a pivotal shift in our understanding of the solar system.