Thinking@TheCulture is a series of questions that we, as tutors feel that are useful in helping students think and improve their understanding.
Thinking Physics@TheCulture is curated by Aaron. More of him can be found here.
Kepler’s Third Law states that the period of a planet’s orbit is directly proportional to the cube of the semi-major axis of its orbit. This allows scientists to calculate distances of planets in our solar system. Can you derive the equation using what you have learned in Motion in a Circle and Gravitational Field?