Final answer:
Brahe's work was helpful because it provided crucial data for Kepler's laws of planetary motion.
Step-by-step explanation:
Tycho Brahe's work was helpful even though his theory of the universe was incorrect because it provided crucial data for Kepler's laws of planetary motion. Kepler used Brahe's accurate observations of planetary positions to derive his three fundamental laws of planetary motion. Kepler's laws describe the behavior of planets in their orbits, such as the fact that planetary orbits are ellipses with the Sun at one focus and the relationship between the orbital period and the semimajor axis of an orbit.