Which contributions did Johannes Kepler make? Select three options.

Question

a.He revived Aristotle’s model of the solar system.
b.He solved Ptolemy’s model by proving elliptical orbits.
c.He proved Galileo’s calculations were incorrect.
d.He determined that planets move faster when closer to the Sun.
He discovered laws of planetary motion.

Answer 1

Johannes Kepler made significant contributions to astronomy, primarily through his formulation of the laws of planetary motion. The three correct options regarding his contributions are:

b. He solved Ptolemy’s model by proving elliptical orbits.
d. He determined that planets move faster when closer to the Sun.
He discovered laws of planetary motion.

Therefore, the key contributions are related to the elliptical nature of orbits and the characteristics of planetary motion.