Famous People: Johannes Kepler and Laws of Planetary Motion
Learn about the renowned mathematician and astronomer who discovered the laws of planetary motion, calculated the birth year of Christ, and found celestial mechanics. Find out about his life and discoveries. Learn the three laws of orbiting bodies revealed by the scientist in 17th century. Includes images, animations, and interactive Java applets.
Grades
 6,
 7,
 8,
 9,
 10,
 11,
 12
Links

Johannes Kepler: His Life, His Laws, and Times
Learn personal facts from Kepler's life on the background of historical times. Find out what Johannes Kepler did first in science. Includes a timeline of historical events. NOTE: The site leads to websites with ads.

Kepler Discovers How Planets Move
Here is a drawn image of Johannes Kepler and short explanation why he is a celebrated scientist.

Motions of the Planets
Learn the scientific view of our solar system and the planetary motion in it evolved with times. Click on the "Johannes Kepler" highlighted words to read a brief annotation on Kepler's works and his input into science. Then select the highlighted "Three Laws of Planetary Orbits" to learn about his three laws. Use buttons at the top to switch from the "Intermediate" level to the "Beginner" or "Advanced". NOTE: This site includes links to social networking sites.

Johannes Kepler: The Laws of Planetary Motion
Learn how Johannes Kepler's work on the most difficult Martian data, collected by Tycho Brahe, led a young scientist to the formulation of laws of planetary motion. Learn about the properties of an ellipse and how it differs from a circle. Includes illustrations.

Internet Archive: NASA: Kepler's Laws
This short video describes Kepler's Three Laws and how the scientist came across this discovery. NOTE: This site requires that video player software such as QuickTime or Real Player be installed on your computer.

Planetary Orbit Simulator
See Kepler's Laws in action with this interactive animation. NOTE: In order to use this site Shockwave Flash must be installed on your computer.

The Galileo Project: Science: Johannes Kepler
Read a full biography of the scientist and view an illustration of Kepler's famous work "The Cosmographic Mystery" where he explained planets' motion inside the solids.

Johannes Kepler: Biography
This Kepler's biography describes and discusses his works and their impact on science.

Fact Monster: Kepler, Johannes
Read about the scientist and his discoveries. Click on the "Kepler's Laws" link to learn three laws of the planetary motion. NOTE: The site includes banner ads.

Imagine the Universe: Theatre: Kepler's Laws
Watch videos with explanations of three laws of planetary motion.

Quotations by Kepler
Read what great scientist had to say about his discoveries and other matter.

Johannes Kepler's Polyhedra
This web page describes Kepler's geometrics discoveries and ideas. Includes Kepler's drawings. NOTE: The reading level is for older students.

Kepler's Laws of Planetary Motion
Select one of Kepler's laws to learn more about each: The Law of Ellipses, The Equal Areas Law, and The Harmonic Law. Each opens in a new window and the examples can be modified for your search query.

Kepler's Three Laws
Learn more about Kepler's three laws, which includes animated examples and charts. Understand the relationship between Newton's laws and Kepler's laws. Scroll down to check your comprehension of this information by answering nine sample questions.

Internet Archive: Kepler's Laws
This short video describes Kepler's Three Laws and how the scientist came across this discovery. NOTE: This site requires that video player software such as QuickTime or Real Player be installed on your computer.