What was Tycho Brahe's greatest contribution to astronomy?

Question

Quizplus · Accepted Answer

Tycho Brahe's greatest contribution to astronomy was his 20 years of careful observations of the planets, which allowed for more accurate and precise measurements of their motions. His observations were used by Johannes Kepler to formulate his laws of planetary motion, which revolutionized astronomy. While Brahe did have a model of the universe and made telescopic observations, they were not his greatest contributions to astronomy. He did not discover the three laws of motion, as that was the work of Isaac Newton.

What Was Tycho Brahe's Greatest Contribution to Astronomy