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Related Flashcards
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Cards In This Set
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Geocentric
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Theory the earth is the center of the Universe
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Heliocentric
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Theory the sun is the center of the Universe
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Orbit
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Motion of one object around another in space
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Ecliptic
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Path followed by the sun across the celestial sphere in one year
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Retrograde
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Movement of planets going backwards with respect to the stars
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Ellipse
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Curve with the property that the sum of the distance from any point on the curve to two given points is constant
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Epicycle
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Ptolemaic Theory, small circle riding on a larger circle on which a planet moves
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Aphelion
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The farthest part on an orbit from the sun
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Perihelion
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Nearest point to sun on an orbit
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Precession
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Slowly changing positions of stars in the sky resulting from variations in the on onentation of earth's access
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Ptolemy
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Knwon for epicycles, deferents and accentc
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Copernicus
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Sun at center, able to measure planets distance from earth
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Tycho Brah
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Observatory in denmark
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Kepler
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Used studies from Brah. Invented keplers three laws
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Galileo
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Telescope, maria, and sun spots
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