Write three laws of Kepler's planetary motion for class 9th
Answers
Kepler’s three laws of planetary motion can be stated as follows:
(1) All planets move about the Sun in elliptical orbits, having the Sun as one of the foci.
(2) A radius vector joining any planet to the Sun sweeps out equal areas in equal lengths of time.
(3) The squares of the sidereal periods (of revolution) of the planets are directly proportional to the cubes of their mean distances from the Sun.
Answer:
Kepler's first law states that the planets move in in elliptical orbits around the sun , with the sun at one of the foci of the elliptical orbit
Kepler's second law states that each planet revolves around the sun in such a way that the line joining the planet to the sun sweeps over equal areas and equal interval of time..
Kepler's third law states that The cube of the mean distance of a planet form the sun is directly proportional to the square of time it takes to move around the sun ..