Skip main navigation

New offer! Get 30% off one whole year of Unlimited learning. Subscribe for just £249.99 £174.99. New subscribers only. T&Cs apply

Find out more

Does Kepler’s third law work on all celestial bodies?

In its original form, Kepler’s third law was developed to describe planetary orbits, that is, the orbits of planets such as earth, mercury, and venus around the sun. Today though, we know that Kepler’s third law applies to all systems with radial force that obey the inverse-square law. Comets, exoplanets (planets that orbit around other stars), moons and even satellites are subject to the forces described in Kepler’s law.

Related stories on FutureLearn

FutureLearn - Learning For Life

Reach your personal and professional goals

Unlock access to hundreds of expert online courses and degrees from top universities and educators to gain accredited qualifications and professional CV-building certificates.

Join over 18 million learners to launch, switch or build upon your career, all at your own pace, across a wide range of topic areas.

Start Learning now