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Purpose of using epicycles and deferents to explain the motion of the planets in the night sky was to account?
Wiki User
∙ 13y ago
retrograde motion
Wiki User
∙ 13y ago
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How do planets move according to the geocentric model of the universe?
A Geocentric model of the solar system would be where the Earth was at the centre of the system, while the sun and planets revolved around the Earth. We now know this not to be true, since the sun is at the centre of the solar system (Heliocentric).
Where is planet Earth and the solar system located?
The heliocentric model is the one that has the Sun at the centre and the Earth the third planet out. We don't use the heliocentric model of Copernicus with its circles and epicycles, that was superseded by Kepler's model, but we still have the Sun at the centre.
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Briefly explain the four phases of the moon?
briefly explain the four phases of the moon
Explain v and d correction for sunmoon and planets?
These corrections are used to account for the rapid motion of the moon. No 'v' correction is available for the Sun, however. The 'd' correction is found by examining the next hourly value, and the 'v' corrections are tabulated halfway through the minute, not linear as they are thought to be.
How did Ptolemy account for the retrograde motion in his model of the Solar system?
Ptolemy used epicycles to explain the retrograde motions of planets.Each plant was assumed to move around a small circle that turns upon a large circle.
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What geometric arrangements did ptolemy use to explain retrograde motion?
Earths faster motion makes Mars appear to be going backwards, the backwards motion, in fact, is what caused retrograde motion. --Ptloemy used Epicycles to explain how geocentrical models worked.
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