History of Astronomy Matching

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Astronomy

Origins of the Universe

Last updated 5:25 PM on 9/20/22
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19 Terms

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Aristotle
Presented observations for the shape of the Earth's shadow on the moon during an eclipse
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Kepler
Used Brahe's data for his work
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Hipparcus
Determined the precession of the Earth
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Aristarchus
Proposed the 1st heliocentric model
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Copernicus
Revived the heliocentric model
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Eratosthenes
1st to calculate the circumference of the Earth
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Brahe
Made meticulous measurements of the planets
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Kepler
Stated that the orbits of the planets are ellipses
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Kepler
Developed a formula to calculate the period and distance of a planet
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Ptolemy
Explained retrograde motion by using epicycles
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Copernicus
Accurately determined the relative distances of the planets from the Sun
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Precession
A change in the direction of the axis of a rotating body
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Period
The time it takes for a cycle to repeat
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Astronomical Unit
Average distance from the Earth to the Sun
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Retrograde Motion
Apparent backward motion of planets
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AU
Unit of measurement for A in Kepler's 3rd law
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Years
Unit of measurement for P in Kepler's 3rd law
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2nd law of planetary motion
Law that states planets sweep out equal areas in equal time
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1st law of planetary motion
Law that states the orbit of a planet is an ellipse