Which of the following is NOT a Kepler ’s law?

Correct option is C

The correct answer is (c) Law of mass.
Kepler's laws describe the motion of planets in their orbits around the Sun, and there are three fundamental laws:
1. Law of Orbits: Every planet moves in an elliptical orbit with the Sun at one of the two foci.
2. Law of Areas: A line segment joining a planet and the Sun sweeps out equal areas during equal intervals of time.
3. Law of Periods: The square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.
The "Law of Mass" is not one of Kepler's laws; it does not describe planetary motion.
Information Booster: ● Kepler's laws help describe and predict planetary motions in our solar system. ● These laws are fundamental to understanding celestial mechanics. ● Kepler’s laws laid the groundwork for Newton's theory of gravitation. ● The Law of Periods allows calculation of the relationship between a planet’s distance from the Sun and its orbital period. ● Kepler's insights into planetary motion were revolutionary for astronomy and physics.