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Unformatted text preview: motions Kepler first tried to match Tychos observations with circular orbits But an 8-arcminute discrepancy led him eventually to ellipses Keplers Three Laws of Planetary Motion: Keplers 1 st Law The orbit of each planet about the Sun is an ellipse with the Sun at one focus. Keplers 2 nd Law As a planet moves around its orbit, it sweeps out equal areas in equal times. Keplers 3 rd Law More distant planets orbit the Sun at slower average speeds, obeying the precise mathematical relationship p 2 = a 3 ; p = orbital period in years and a = average distance from the sun in AU Newtons Three Laws of Motion: 1 st Law of Motion An object moves at constant velocity unless a net force acts to change its speed or direction. 2 nd Law of Motion Force = mass x acceleration 3 rd Law of Motion For any force, there is always an equal or opposite reaction force....
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This note was uploaded on 01/25/2012 for the course 750 110 taught by Professor Ericgawaiser during the Fall '10 term at Rutgers.
- Fall '10