gravitation scients\ists stuff
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10 Terms
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Ptolemy (1st)
Greek mathematician, geocentric universe theory, circular orbits
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geocentric
everything rotates around earth
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heliocentric
everything revolves around sun
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Copernicus (2nd)
Proposed heliocentric universe theory, belived in circular orbits.
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Galileo (3rd)
used a telescope and found data to support heliocentric theory, believed in circular orbits
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Brahe (4)
Measured orbits of planets precisely
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Kepler (5)
created three laws heliocentric, ellipses orbit, had three laws
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Kepler 1st law
Didn’t revolve in perfect circles→elliptical with sun at foci
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Kepler 2nd law
Planets cover same area in same time (moves faster when closest to sun, slower when far)
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Kepler 3rd law
(TA/TB)2=(RA/RB)3
Note 
Flashcards (58)