Other
Sandburg Center for Sky Awareness: What Are the Shapes of the Planets' Orbits?
In this lesson plan investigation students learn about the shapes of the planetary orbits by experimenting with ellipses of different proportions.
NASA
Nasa: Kepler and His Laws
This site from NASA provides biographical details about the lives of Tycho Brahe and Johannes Kepler. Discusses Kepler's successes at developing laws of planeatry motion. States the three laws and discusses each one individually....
NASA
Nasa: Kepler's Second Law
This site from NASA states Kepler's second law of planetary motion and depicts its meaning with an informative diagram. Relates the law to conservation of energy principles and discusses the eccentricity of a satellite's (or a planet's)...
Texas Instruments
Texas Instruments: Multiple Choice Planetary Motion Study Cards
Kepler's Laws 1,2,3 including eccentricity of elliptical orbits. Good for reviewing planetary motions (NYS Earth Science).
Cornell University
Cornell University: Astronomy: Orbital Motion and Kepler's Laws
At this site from the Astronomy Department of Cornell University, Kepler's three laws of planetary motion are stated. There are brief explanations of each, along with links to additional information on related subjects.
Science Education Resource Center at Carleton College
Serc: Build Your Own Solar System
This Java applet creates a model of a solar system with user-defined data. Users can create a solar system with up to four planets, choosing the star type at the center of the solar system, planet name, size, eccentricity of orbit and...
Georgia State University
Georgia State University: Hyper Physics: Kepler's Laws
An outstanding page describing Kepler's three laws of planetary motion.