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Ptolemy had three different systems for explaining planetary orbit all of which were geocentric in nature. Meaning they had the earth at the center of the known universe. There was an epicycle on deferent model. In which the planets rotated in perfectly circular orbits (epicycle) around a point in space which then rotated in a larger circle (defernet) around the earth. The second model was called the eccentric model in which the planets rotated around a large circle with its center of orbit being a point at the center with the location of the earth being of centered, and the earth remaining stationary. The third model was the equant model in which the earth and a location in space called the equant were located on equal but opposite sides of the center of the planets orbit. The whole point to all of these was to attempt to preserve the traditional view of planetary movement being uniform and the earth being at the center while still explaining such oddities as retrograde. Which is when a planet continues in one direction and then makes a temporary reversal in motion and carries on back in the opposite direction only to resume it regular course.
Source: Copernican Questions
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Who was ptolemys?
Cleopatra
Who was ptolemys wife?
you are a ideot dumb one
How is Copernicus' description of the system of planets different from ptolemys description?
Ptolemy thought the earth was the center of the solar system (Otherwise known as the Geocentric theory) and Copernicus's idea was that the sun was at the center of the solar system (Heliocentric theroy).
What was foundation of Ptolemys geocentric model of the universe?
Earth was the center of the universe
In the late 1500s ptolemys observations were supplanted by those of...?
later Greek astronomers
Who contradicted Ptolemys geocentric model?
The heliocentric model proposed by Nicolaus Copernicus contradicted Ptolemy's geocentric model. Copernicus suggested that the Sun, rather than the Earth, was at the center of the solar system.
What year was ptolemys world map made in?
his map was made in 1482. and used by cristpher colombus.
Ptolemys proof of his beliefs would be acceptable today why or why not?
Yes, it would be! And No it wouldn't at the same time!
Did Cleopatra have 6 siblings?
lets she...there was tryphaeana, berenice, arsinoe, and the two tiny ptolemys. . . .that makes five
What was ptolemys explanation for why the planets seemed to move at different speeds?
The planets move on little circles that move on bigger circles.
What are the different types of system requirements?
type of system requirements how to type of system requirements in IT?
What page does Nathaniel kiss Kitty in Ptolemys Gate?
he doesn't. They barely realize that they may like each other until one of them dies.
