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How many planets were in Ptolemy time?
60
What year did ptolemy discover pegasus?
Ptolemy did not discover Pegasus; instead, he was a Greek astronomer and mathematician who lived in the 2nd century AD. The constellation Pegasus was named after the winged horse from Greek mythology and was recognized long before Ptolemy's time. Ptolemy cataloged it in his work "Almagest," which was compiled around 150 AD.
Who belived that the planets move in epicycles?
The Greek astronomer Ptolemy believed that the planets move in epicycles, which are small circles that the planets orbit while also moving along their larger orbital paths. Ptolemy's geocentric model of the universe was widely accepted for centuries until it was eventually replaced by the heliocentric model proposed by Copernicus.
Which assuptions do ptolemy and Copernicus disagree upon?
Ptolemy thought the earth was the center of the universe, so that the stars, the other planets and the sun revolved around the earth; Copernicus realized that for the orbits of the planets to make sense, the earth and the other planets had to revolve around the sun.
What was ptolemy theory on planets?
The astronomical system of Ptolemy, in which the earth is at the center of the universe with the sun, moon, planets, and stars revolving about it in circular orbits.Ptolemaic system Ptolemy believed that Earth was at the center of the universe and that the Sun and planets orbited Earth (with the planets also moving in smaller circles called epicycles). In this system, the centers of Mercury's and Venus's epicycles always lie on the line shown in the diagram between the Earth and the Sun.
How many planets were in Ptolemy time?
60
How many planets have been discover in the solar system?
14
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.
When did Claudius ptolemy discover the geocentric theory?
in the year 2018
What was Ptolemy's idea on space?
that the earth was in the middle of the universe
What year did ptolemy discover pegasus?
Ptolemy did not discover Pegasus; instead, he was a Greek astronomer and mathematician who lived in the 2nd century AD. The constellation Pegasus was named after the winged horse from Greek mythology and was recognized long before Ptolemy's time. Ptolemy cataloged it in his work "Almagest," which was compiled around 150 AD.
Who proposed the reason that planets orbit the sun?
i think ptolemy
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
Who belived that the planets move in epicycles?
The Greek astronomer Ptolemy believed that the planets move in epicycles, which are small circles that the planets orbit while also moving along their larger orbital paths. Ptolemy's geocentric model of the universe was widely accepted for centuries until it was eventually replaced by the heliocentric model proposed by Copernicus.
Did Galileo's observations confirm the validity of retrograde motion of the planets?
No, Ptolemy did.
How did Ptolemy prove his model?
Galileo explained the backwatds motion of the planets
