Describe the model and theory of planetary motions presented in earliest of times.

Explanation

`implies` The earliest recorded model for planetary motions proposed by Ptolemy about 2000 years ago was a .geocentric. model in which all celestial objects, stars, the sun and the planets, all revolved around the earth.
 `implies` A more elegant model in which the sun was the centre around which the planets revolved the "heliocentric. model was mentioned by Indian Rushi and scientist Shri Aryabhatta in his treatise.
 `implies` A thousand years later, Nicholas Copernicus proposed a model in which the planets moves in circles around the fixed central sun. His theory was discredited by the church but notable by Galileo.
 `implies` After Galileo, Tycho Brahe recorded observations of the planets with the naked eye.
 `implies` His compiled data were analyzed by Johannes Kepler. He gave three laws for planetary motion.
`implies` These laws were known to Newton and enabled him to make a great scientific leap in proposing his universal law of gravitation.