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Unformatted text preview: for the general leading the Catholic army during the 30 years war. Kepler’s mathematical skill, together with Brahe’s observational records solved the problem of the shape of the solar system Right from the start it was clear to Kepler that only a Sun-centered system would explain the observations. BUT, his first insight was that orbits were not circular….they were ellipses Kepler’s Laws Law #1. Each planet moves in an ellipse with the Sun at one focus. Law #2. The line between the Sun and the planet sweeps over equal areas in equal time intervals Law #3: The square of the orbital period of a planet (in years) is directly proportional to the cube of the semi-major axis of its orbit (in AU). a3 = P2...
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- Spring '08
- Astronomy, Thirty Years' War, Planet, Kepler's laws of planetary motion