Kepler's third law states that square of period of revolution ($T$) of a planet around the sun, is proportional to third power of average distance $r$ between sun and planet i.e. $T^2 = K r^3$ here $K$ is constant. If the masses of sun and planet are $M$ and $m$ respectively then as per Newton's law of gravitation force of attraction between them is $F = GMm/r^2$ here $G$ is gravitational constant. The relation between $G$ and $K$ is described as: