Johannes Kepler, the Astronomer Who Discovered "Kepler's Laws", Died 380 Years Ago

Johannes Kepler (1571 – 1630) was a German mathematician, astronomer and astrologer, and key figure in the 17th century scientific revolution. He is best known for his three laws of planetary motion, codified by later astronomers, based on his works that also provided one of the foundations for Isaac Newton's theory of universal gravitation.

Kepler's laws give a description of the motion of planets around the Sun.

Kepler's laws are:

1. The orbit of every planet is an ellipse with the Sun at one of the two foci.
2. A line joining a planet and the Sun sweeps out equal areas during equal intervals of time.
3. The square of the orbital period of a planet is directly proportional to the cube of the semi-major axis of its orbit.

- Wikipedia

Science Fair Project Information
Title: Stars And What They Can Become
Subject: Aviation
Grade level: Primary School, Grades K-3
Academic Level: Ordinary
Project Type: Descriptive
Cost: Low
Awards: 1st place, Canada Wide Virtual Science Fair (2008)
Affiliation: Canada Wide Virtual Science Fair (VSF)
Year: 2008
Description: Main topics: How are stars born? What different types of stars are there? How do stars die? What are binary stars? All about our sun.

Link: http://www.odec.ca/projects/2008/lafl8s2/