Kepler's third law holds true mathematically only if the period is expressed in years and the semimajor axis is expressed in AU.

Question

Quizplus · Accepted Answer

Kepler's third law can be applied using any consistent units of time and distance, but the specific form where the period squared equals the semimajor axis cubed (P^2 = a^3) holds when using years and astronomical units (AU) for simplicity in the solar system.

Kepler's Third Law Holds True Mathematically Only If the Period