Question

what is keplers law .......

Answer 1

three theorems describing orbital motion. The first law states that planets move in elliptical orbits with the sun at one focus. The second states that the radius vector of a planet sweeps out equal areas in equal times. The third law relates the distances of the planets from the sun to their orbital periods.



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.

Answer 2

Kepler’s laws of planetary motion:

First law (law of orbits) : Each planet revolves around the sun in an elliptical orbit with the sun situated at one of the two foci.

Second law (law of areas) : The areal velocity of a planet around the sun remains constant. OR, The radius vector drawn from the sun to the planet sweeps out equal areas in equal intervals of time.

Third law (law of periods) : The square of the time period of revolution of a planet around the sun is proportional to the cube of the semi major axis of its elliptical orbit.