Kepler's three laws of planetary motion were useful but not considered fully explained until
A) Galileo developed the telescope for astronomical observation.
B) Vivaldi composed his astronomical concerto, "The Four Seasons."
C) Pythagoras developed his famous theorem about right triangles and the Golden Ratio.
D) Newton introduced the law of universal gravitation for astronomical and terrestrial objects.

Question

Quizplus · Accepted Answer

Kepler's laws described the motion of planets, but did not explain why they moved in this way. Newton's law of universal gravitation showed that the motion of planets was due to the gravitational attraction between them and the sun, providing a complete explanation for Kepler's laws.

Kepler's Three Laws of Planetary Motion Were Useful but Not