Learn about how Earth orbits the sun and how satellites orbit the Earth. Discover the different types of satellites such as GOES and POES and what they are used to monitor.

This site from NASA helps in explaining a barycenter. "In the case of the Earth and the Sun, both bodies actually revolve, or spin, around the center of the mass between them. This point is called the barycenter."

This site from NASA states Kepler's third law of motion and extends it to develop an equation for the velocity of an orbiting planet.

This thorough site presents a wealth of facts about the fifth largest planet. Topics you will find discussed include size, mass and gravity, length of day, orbit, moons, and more. Various Jupiter activities are found on this site such as...

A wealth of facts await you on this complete site. Topics include size, mass and gravity, length of day, orbit, distance from the sun, and more. A coloring page, quiz, fill-in-the-blanks activity, and interactive puzzle will challenge...