Gravity
Astronomy, gravity, Kepler's laws, geostationary satelites, earth and moon system are topics in these animations.
Play and experiment with these games and animations about gravitational pull.
Observe the effects gravity has on objects, planets and stars. Gravity keeps the planets in their orbits around the sun. Gravity "glues" us to the surface or the earth. Gravity confines the atmosphere to a layer around the earth.