kepler's laws

The Sailor's Word-Book

Three famous laws of nature detected by Kepler early in the seventeenth century:


1. The primary planets revolve about the sun in ellipses, having that luminary in one of the foci.

2. The planets describe about the sun equal areas in equal times.

3. The squares of the periodic times of the planets are to each other as the cubes of their mean distances from the sun.

Related Words