Answer: True.
Kepler was an astronomer, astrologer and mathematician. He was an apprentice of Tycho Brahe, other big (maybe the biggest) astronomer of their time.
Kepler is best known for his 3 laws of planetary motion.
1) the orbit of a planet is an ellipse with the Sun at one of the two foci
2) A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time
3) The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.
