planetary science 1

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9 Terms

1
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geocentric

earth at centre, Anaximander and ptolemy

2
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heliocentric

sun at centre, copernicus, brahe, kepler, galilei

3
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ptolemy

geocentric, epicycles, fails to explain phases of venus

4
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copernicus

heliocentric, explains phases of venus

5
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brahe

built large instruments dedicated to movement of planets, used astrolabes to measure positions and motions of planets

6
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kepler

found mathematical fir to brahes observations ie keplers laws- orbits= ellipses not perfect circles, says how planets move but not why

7
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galilei

used telescope, observations supported heliocentric ie moons around jupiter, phases of venus, imperfect/ cratered surface moon

8
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newton

3 laws of motion, derived keplers laws from fundamental principles, doesnt explain precession of mercurys orbit

9
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einstein

theory of general relativity, distorting space time continuum, explains precession of mercurys orbit