A major contribution of Johannes Kepler to the development of modern astronomy was
A) development of the first mathematical heliocentric model of the solar system.
B) the first model in which planetary orbits are ellipses.
C) use of parallax to prove that Earth moves around the Sun.
D) observation of the satellites (moons) of Jupiter.

Question

Quizplus · Accepted Answer

Kepler's major contribution was the formulation of his three laws of planetary motion, the first of which states that planets move in elliptical orbits with the Sun at one focus. This was a significant departure from the circular orbits proposed by earlier models, including the Copernican system.

A Major Contribution of Johannes Kepler to the Development of Modern