What did Kepler base his three laws of planetary motion on?
A) the idea that an ellipse is the perfect shape
B) precise observations of the apparent motions of planets
C) Newton's three laws of motion
D) the observation of the phases of Venus

Question

Quizplus · Accepted Answer

Kepler's three laws of planetary motion were based on precise observations of the apparent motions of planets, particularly the detailed data collected by Tycho Brahe. Kepler used this extensive dataset to develop his laws, which describe how planets orbit the Sun.

What Did Kepler Base His Three Laws of Planetary Motion