kepler proposed the 3 laws of planetary motion.
kepler proposed the 3 laws of planetary motion.
who proposed the 3 laws of planetary motion?
kepler
section::::up to newton.:kepler's model.









































in 1609, johannes kepler, using his teacher's (tycho brahe) accurate measurements, noticed the inconsistency of the geocentric model and confirmed the heliocentric model is a more accurate and consistent model. kepler derived the 3 laws of planetary motion which changed the model of the solar system and the orbital path of planets. the 3 laws of planetary motion are:









































bullet::::1. all planets orbit the sun in elliptical orbits (image on the left) and not perfectly circular orbits.









































bullet::::2. the radius vector joining the planet and the sun has an equal area in equal periods.
historical models of the solar system
al-bitruji proposed a theory on planetary motion in which he wished to avoid both epicycles and eccentrics, and to account for the phenomena peculiar to the wandering stars, by compounding rotations of homocentric spheres. this was a modification of the system of planetary motion proposed by his predecessors, ibn bajjah (avempace) and ibn tufail (abubacer). he was unsuccessful in replacing ptolemy's planetary model, as the numerical predictions of the planetary positions in his configuration were less accurate than those of the ptolemaic model, because of the difficulty of mapping ptolemy's epicyclic model onto aristotle's concentric spheres.
nur ad-din al-bitruji