At this site from Cornell University, Kepler's three laws of planetary motion are stated. There are brief explanations of each. The laws are applied to explain the features of planetary orbits as well as the motion of binary star...

An exhaustive (very exhaustive) biographical account of Johannes Kepler. Describes at length his upbringing, childhood, education, personality and scientific endeavors. Focus is on his development of a cosmological model and the laws of...

This site provides directions for a basic activity that allows students to explore Newton's Third Law of Motion.

In this online lesson plan students can experience Newton's Laws of Motion in relation to rockets with this experiment.

In this online lesson plan students can experience Newton's Laws of Motion in relation to rockets with this experiment.

(1642-1727) English natural philosopher, mathematician, and physicist most famous for gravity and his laws of motion.

This image shows Johannes Kepler, a German astronomer famous for his laws of planetary motion. Check out our Johannes Kepler facts page for more information.

A key figure in the scientific revoluion, a German astrologer, astronomer, and mathematician of famed brilliance. He is best known for his laws of planetary motion.