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21. Keplers Three Laws

# 21. Keplers Three Laws - was in motion with all the other...

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THE MECHANICAL UNIVERSE Name: Mai Nguyen Video 21. Kepler’s Three Laws Class: PHYS 2425 1p1 Note: Johannes Kepler is Professor Brooks’ favorite scientist! 1. Describe the Tyconic system: The earth is stationary at the center, the sun revolves around the earth, and all the other planets revolve around the sun. 2. What length is always a constant for an ellipse? The point from one pin from the pencil to the other pin is constant. This ‘point’ is called a focus, or foci for plural. 3. What does “eccentricity” mean? “Somewhat off center” 4. What is the Latin word for “fireplace?” Focus 5. What scientist was known as the “Wandering Mathematician?” Johannes Kepler 6. Whose astronomical data was essential to Kepler? Tycho Brahe 7. What were some of the problems presented to Kepler by the Copernican solar system? Kepler had to make mathematical observations about a planet that

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Unformatted text preview: was in motion with all the other planets (“moving platform that spins on it’s axis, with constant varying velocity and an unknown center”). 8. How many pages did Kepler’s calculations total? Over 900 pages 9. Describe the position of Mars when it is in “opposition?” In line with the sun and earth; Seen from either the earth or the sun, the position of mars is the same. 10. A Parabola is a conic section with eccentricity equal to 1. 11. What career did Kepler turn to during the war to support his family? Fled to city to city and collected old debts; cast patron’s astrological charts. 12. What determines the value of a scientific idea? Lies in whether the idea is fruitful, leads us to new ideas and progress....
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