Question

What must you know to solve Kepler's third law, the law of periods?

A. Period of the minor axis
B. Period of the orbit
C. Period of the revolution around the sun
D. Period of the major axis

Answer 1

D. period of the orbit

Answer 2

Answer: B. Period of the orbit

Step-by-step explanation:

According to the Third Kepler’s Law of Planetary motion “The square of the orbital period of a planet is proportional to the cube of the semi-major axis (size) of its orbit”.

Talking in general, this law states a relation between the orbital period
`T` of a body (moon, planet, satellite) orbiting a greater body in space with the size
`a` of its orbit.

This Law is originally expressed as follows:

`T^(2)=(4\pi^(2))/(GM)a^(3)`

Where;

`G` is the Gravitational Constant

`M=1.9(10)^(27)kg` is the mass of the massive (greater) body

`a` is the semimajor axis of the orbit of the smaller body