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How did ptolemy explain the way planets seemed to move at different speeds and even backwards?
Ptolemy explained the apparent retrograde motion of planets through his geocentric model, where Earth is at the center of the universe. He introduced the concept of epicycles, where planets move in small circles (epicycles) along larger circular orbits (deferents) around the Earth. This model allowed him to account for the varying speeds and occasional backward motion of planets as observed from Earth, creating a complex but comprehensive system that matched the astronomical observations of his time.
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How many planets did ptolemy discover?
Ptolemy did not discover any planets. He lived in the 2nd century AD and his work primarily focused on developing mathematical models to explain the motion of the planets as observed from Earth. The discovery of the planets we now know was made by astronomers in different time periods.
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.
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.
How was Ptolemy's model different from the earlier Greek model?
Ptolemy's model is different from the earlier Greek model because Ptolemy developed a compllex geocentric model of the universe and his model seemed to explain motions until the 1500s.The early Greek astronomers believed that Earth was the center of the universe.
What did ptolmey say about the solar system?
Ptolemy sought to explain planetary movements by stating that every planet in the solar system revolved around the sun. Astronomers began to question this explanation when they realized that planets often appeared to be moving backwards relative to Earth.
How many planets did ptolemy discover?
Ptolemy did not discover any planets. He lived in the 2nd century AD and his work primarily focused on developing mathematical models to explain the motion of the planets as observed from Earth. The discovery of the planets we now know was made by astronomers in different time periods.
What was Ptolemy trying to explain in his model by haven't the planets move on smaller circles that move big circles?
ptolemy did something
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.
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.
How was Ptolemy's model different from the earlier Greek model?
Ptolemy's model is different from the earlier Greek model because Ptolemy developed a compllex geocentric model of the universe and his model seemed to explain motions until the 1500s.The early Greek astronomers believed that Earth was the center of the universe.
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 did ptolmey say about the solar system?
Ptolemy sought to explain planetary movements by stating that every planet in the solar system revolved around the sun. Astronomers began to question this explanation when they realized that planets often appeared to be moving backwards relative to Earth.
How was Copernicus model of the universe different from ptolemy's?
Copernicus's model thought that the planets orbited the sun. Ptolemy's model thought that the planets orbited the moon.No. The above answer is incorrect.Copernicus's model thought that the planets orbited the sun. Ptolemy's model thought that the planets orbited the EARTH in epicycles. Not the moon. (The model that modeled the planets orbiting earth was the Geocentric model. Aristotle theorized this.)Copernicus's model is known as the Heliocentric model. Ptolemy's theory of epicycles is when the planets revolved in large circles around Earth.
How was Copernicus model of the universe different from Ptolemy's model?
Copernicus's model thought that the planets orbited the sun. Ptolemy's model thought that the planets orbited the moon.No. The above answer is incorrect.Copernicus's model thought that the planets orbited the sun. Ptolemy's model thought that the planets orbited the EARTH in epicycles. Not the moon. (The model that modeled the planets orbiting earth was the Geocentric model. Aristotle theorized this.)Copernicus's model is known as the Heliocentric model. Ptolemy's theory of epicycles is when the planets revolved in large circles around Earth.
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!
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!
