Final answer:
Tycho Brahe and Johannes Kepler provided evidence for the heliocentric model of the solar system and explained planetary motion with elliptical orbits.
Step-by-step explanation:
Tycho Brahe and Johannes Kepler made significant contributions to our understanding of the solar system and revolutionized the currently believed model. They provided evidence for the heliocentric model and explained planetary motion with elliptical orbits. Kepler's three laws of planetary motion described the behavior of planets based on their paths through space, including the fact that planetary orbits are ellipses with the Sun at one focus.