images

Kepler's Law - Illustration

by

S.Beaucourt/Novapix

Reference

a-sys01-10001

Date

2010-03-17

Second Kepler's law, the line joining a planet and the Sun sweeps out equal areas during equal intervals of time. The planet moves faster near the Sun, so the same area is swept out in a given time as at larger distances, where the planet moves more slowly.