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What was Ptolemy trying to explain in his model by having the planets move on smaller circles that move on the bigger circles?
Ptolemy proposed the use of epicycles (small circles) within deferents (larger circles) to explain the observed retrograde motion of planets. The epicycles were used to account for the variability in a planet's speed as it moved along the deferent in his geocentric model.
What are the similarities beween Copernicus' model of the universe and Ptolemy's model of the universe?
Both Copernicus' and Ptolemy's models aimed to explain the motion of celestial bodies in the sky. However, Copernicus placed the Sun at the center of the universe, while Ptolemy's model had Earth at the center. Both models used the concept of epicycles to explain the retrograde motion of planets.
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.
What was ptolemy trying to explain in his model by having the planets move move on circles that move on bigger circles?
Ptolemy is trying to explain in his model that each circle represents 1 planet's rotation and it's a scale drawing of the distance apart from each one!
The observed retrograde motion of planets led ptolemy to add blank to Aristotles system?
The observed retrograde motion of planets led Ptolemy to add epicycles to Aristotle's system. Epicycles were small circles that planets moved in on their larger circular orbits around Earth in order to explain the appearances of retrograde motion.
What was Ptolemy trying to explain in his model by having the planets move on smaller circles that move on the bigger circles?
Ptolemy proposed the use of epicycles (small circles) within deferents (larger circles) to explain the observed retrograde motion of planets. The epicycles were used to account for the variability in a planet's speed as it moved along the deferent in his geocentric model.
What are the similarities beween Copernicus' model of the universe and Ptolemy's model of the universe?
Both Copernicus' and Ptolemy's models aimed to explain the motion of celestial bodies in the sky. However, Copernicus placed the Sun at the center of the universe, while Ptolemy's model had Earth at the center. Both models used the concept of epicycles to explain the retrograde motion of planets.
Describe what produces the retrograde motion of mars. what geometric arrangement did Ptolemy use to explain this 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.
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.
What was ptolemy trying to explain in his model by having the planets move on smaller circles that move on bigger circles?
Ptolemy is trying to explain in his model that each circle represents 1 planet's rotation and it's a scale drawing of the distance apart from each one!
What was ptolemy trying to explain in his model by having the planets move move on circles that move on bigger circles?
Ptolemy is trying to explain in his model that each circle represents 1 planet's rotation and it's a scale drawing of the distance apart from each one!
What was Ptolemy trying to explain in his model by having the planets move on smaller circle that move on bigger circle?
Ptolemy is trying to explain in his model that each circle represents 1 planet's rotation and it's a scale drawing of the distance apart from each one!
How does ptolemy explain retrograde motion?
Ptolemy explained retrograde motion through his geocentric model of the universe, where Earth is at the center and all celestial bodies, including planets, orbit around it. He introduced the concept of epicycles, which are small circular orbits that planets follow while moving along a larger circular path called a deferent. When a planet moves along its epicycle in such a way that it appears to move backwards relative to the stars, it creates the observed retrograde motion. This model allowed Ptolemy to account for the complex movements of planets as observed from Earth.
What was Ptomeny trying to explain in his model by having the planets move on smaller circles that move on bigger circles?
to explain the motion of planets, especially the phenomenon of retrograde motion where planets appear to temporarily reverse their direction of motion. Ref: Andrew Liddle "An Introduction to modern Cosmology".
The observed retrograde motion of planets led ptolemy to add blank to Aristotles system?
The observed retrograde motion of planets led Ptolemy to add epicycles to Aristotle's system. Epicycles were small circles that planets moved in on their larger circular orbits around Earth in order to explain the appearances of retrograde motion.
How was Copernicus' idea of planet movement different from ptolemy's?
Copernicus proposed a heliocentric model, where planets revolve around the sun, while Ptolemy's geocentric model placed Earth at the center of the universe with planets orbiting around it. Copernicus' model helped to explain retrograde motion more simply than Ptolemy's epicycles.
Why would Ptolemy not explain venus phases?
Ptolemy did not explain Venus phases in his geocentric model because he believed that Venus, like all other planets, moved around the Earth in perfect circles and did not exhibit phases like the Moon. His model could not account for the varying phases of Venus because it was based on circular motion and did not include elliptical orbits or the correct understanding of planetary motion.
