Periods of N-body Systems Determined Through Dimensional Analysis

A generalization of classical dimensional analysis, presented in a separate article, makes it possible to derive Kepler’s third law for the period of a two-body system, up to a multiplicative constant, without solving the equations of motion. Here we show how to derive generalizations of Kepler’s third law to n-body systems by the same technique. Our results agree with conjectures by Sun on the period of a classical n-body system and by Semay and Sun on the quantum-theoretical counterpart of the period of a classical n-body system.