Question

which contributions did johannes kepler make? select three options.
he revived aristotles model of the solar system.
he solved ptolemys model by proving elliptical orbits.
he proved galileos calculations were incorrect.
he determined that planets move faster when closer to the sun.
he discovered laws of planetary motion.

Explanation:

1. Kepler did not revive Aristotle's geocentric model; he supported a heliocentric framework.
2. Kepler replaced Ptolemy's circular orbit model with proven elliptical orbits for planets.
3. Kepler did not disprove Galileo's calculations; their work complemented each other.
4. Kepler's second law of planetary motion states planets speed up near the Sun.
5. Kepler is famous for his three fundamental laws of planetary motion.

Answer:

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