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Describe the model and theory of planetary motions presented in earliest of times. |
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Answer» Solution : `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. |
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