Keplerís third law

Keplerís third law

. The orbital periods of the planets are plotted against their semi-major axes, using a logarithmic scale. The straight line that connects the points has a slope of 3/2, thereby verifying Keplerís third law that states that the square of the orbital periods increase with the cubes of the planetary distances. This type of relation applies to any set of bodies in elliptical orbits, including Jupiterís four largest satellites shown in the inset.

Copyright 2010, Professor Kenneth R. Lang, Tufts University