Question

What is Kepler’s third law? Describe what it means for objects in orbit around other objects. Explain using an example of actual orbiting objects

Answer 1

Kepler’s third law states that the square of the orbital period of a planet is proportional to the cube of the semi-major axis of its orbit.

What it means for objects in orbit around other objects.

A planet farther from the Sun not only has a longer path than a closer planet, but it also travels slower, since the Sun’s gravitational pull on it is weaker. Therefore, the larger a planet’s orbit, the longer the planet takes to complete it.

For example mercury has larger orbit that Earth’s, so it take more time for completing the revolution.