## Keplers Third Law For Orbital Period

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

## $$\frac{\sqrt{4{\Pi}^{2}{r}^{3}}}{\mathrm{gm}}$$

Here,t=period,g= Gravitational constant,r=distance between the centers of mass of the two bodies,m=mass.

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