Kepler's Laws
.....An ellipse game
,,,The history of the ellipse
,,,SemiMajor axis defined
....Kepler's Laws
...Test out Kepler's 3rd Law
....Our Solar System
....Watch the moons of Jupiter
.....Show GPS satellites orbiting earth
........Shows which parts of the earth are in sunshine and shadow etc
                           High school physics and chemistry      www.physchem.info