Question

Kepler law of periods.........

Answer 1

Answer:

Law of periods :-

The square of time taken by a planet to complete a revolution around the sun is directly proportional to the cube of semi - major axis of the elliptical orbit.

$\boxed{\rm T^2 \propto r^3}$

Answer 2

Answer:

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Step-by-step explanation:

In astronomy, Kepler's laws of planetary motion, published by Johannes Kepler between 1609 and 1619, describe the orbits of planets around the Sun. The laws modified the heliocentric theory of Nicolaus Copernicus, replacing its circular orbits and epicycles with elliptical trajectories, and explaining how planetary velocities vary. The three laws state that:

The orbit of a planet is an ellipse with the Sun at one of the two foci.

A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.

The square of a planet's orbital period is proportional to the cube of the length of the semi-major axis of its orbit.