Gravitation - People/Kepler's Laws

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7 Terms

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Ptolemy

  • (100 A.D.)

  • Greek mathematician

  • Geocentric (earth at the center) universe theory

  • Believed in a circular path

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Copernicus

  • (1470-1543)

  • Heliocentric (sun in the center) universe theory

  • Believed in a circular path

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Galileo

  • (1564-1642)

  • Used a telescope to gather evidence to support the heliocentric theory

  • Believed in a circular path

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Brahe

  • (1546-1601)

  • Gathered precise measurements of the positions of the planets

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Kepler’s 1st Law

  • The orbit of the planets is an ellipse with the sun at a foci

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Kepler’s 2nd Law

  • Planets cover the same area of space in the same amount of time

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Kepler’s 3rd Law

(Ta/Tb)² = (Ra/Rb)³