Gravitation Scientists
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5 Terms
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Ptolemy
Theorized that we have a geocentric universe (Earth is center)
Planets revolve around the earth in circular orbits
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Copernicus
Theorized that we have a heliocentric universe (Sun is center)
Planets revolve around the sun in circular orbits
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Galileo
Provided evidence to support the heliocentric theory by using his telescope
Planets revolve around the sun in circular orbits
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Brahe
Gathered precise measurements of the position of the planets
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Kepler
1st law: Planets orbit the sun in an elliptical path with the sun is at one foci
2nd law: Planets cover the same area in the same amount of time
3rd law: \left(\frac{Ta}{Tb}\right)^2=\left(\frac{Ra}{Rb}\right)^3
Note 
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