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Ptolemy
Ptolemy was an Egyptian mathematician and scientist. He lived from 90 to 168 AD.
412 Questions
Who was more accurate Ptolemy or Copernicus?
Copernicus was correct in believing in the heliocentric model of the Solar System, which said the planets rotated round the sun. Ptolemy accepted the traditional geocentric view which had the Earth at the centre of the Solar System.
When did Ptolemy discover the earth was at the center of the universe?
Never. It was one of the theories that were in play during his lifetime, and eventually the heliocentric theory, with the planets orbiting the Sun, was generally accepted. But it was Kepler's theory that has been accepted rather than Coprnicus's theory as supported by Galileo.
Whether the Sun was at the centre or not was only part of the whole theory, and Kepler's elliptical orbits are now believed to represent the correct model, and not Copernicus's model which used circles and epicycles.
When did Ptolemy create the map of the world?
This is a cylindrical map projection. It is a standard map for nautical purposes because it represents lines of constant course, called Rhum Lines, as straight segments. This is precisely the type of route employed by ships at sea. Compasses are used to indicate geographical direction and to steer the ship. The projection was presented by Mercator in 1569
How do you pronuse the word ptolemy''?
There are various possibilities. The source of the ancient name was the same as the source of the English word "polemic." In ancient times it may have been pronounced with the T, the P, or both. An alternate spelling in ancient Greek was "Polemos," which is how it appears in Homer, and a nephew of Antigonus I (382-301 BC), was named Polemaeus. It comes into modern Italian as "Tolomeo," and ancient Aramaic as "Talmai," but the modern Arabic equivalent is transliterated as "Batlemos," pronouncing both the P (converted to a B) and the T.
What were the similarities between Ptolemy's model and Copernicus' model?
Both Copernicus heliocentric and the Ptolemaic models agreed on the need for epicycles. These were miniature orbits that the celestial bodies travelled on as well as their normal orbits.
Copernicus still invigaed the bodies orbiting in perfect circles and had to put these in to explain some of the movements of the planets. This may have contributed to his ideas being largely dismissed as it was just as complicated as the already established model. It was not until Kepler proposed elliptical orbits was this problem resolved.
Did Claudius ptolemy go to school?
There is no definitive evidence that Claudius Ptolemy attended a formal school. His education likely came from self-study and learning within intellectual circles of his time. Ptolemy was a Roman citizen of Greek descent known for his work in astronomy and geography.
Who was the first scientist to dispute Ptolemy's model of a geocentric or Earth-entered universe?
Nicolaus Copernicus < NOVA NET ANSWER
Who replaced circles with ellipses in a helicentric model of the universe?
Johannes Kepler replaced circles with ellipses in the heliocentric model of the universe.
What was the foundation of ptoelmy geocentric model of the universe?
Claudius Ptolemy, an Egyptian geographer, mathematician, and astronomer, is credited with the Ptolemaic Model of the solar system. His model posited not only that the Earth was the center of the entire universe and assumed that the planets all moved in epicycles--small circles--that also moved along even larger circles called deferents.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
Please be more specific in regard to Ptolemy -- there were many. One was a mathematician/astronomer and the other was a general of Alexander the Great who founded the last pharonic dynasty in Egypt. There were 15 Ptolemies who followed him and many of them had a relationship with Rome.
How did Galileo prove ptolemy's theory of space wrong?
Copernicus produced his model with the Sun at the centre in 1543, and then in 1609 Kepler produced the model that we use now. Kepler's model also uses the idea of having the Sun at the centre. No-one proved anything but after Newton's discoveries in physics it was realised that Kepler's model fitted exactly with Newton's later theories in gravity and dynamics, so that's why it became accepted, and it still is.
What came first captain cooks maps Newfoundland or Ptolemy's world map?
Gerhard Kremer, also known as Geradus Mercator (it was fashionable to have a Latin nickname in the 16'th Century), produced his first map in 1537.
Ptolomy, who liked to call himself Claudius Ptolemaeus, did his thing in the 2'nd century - so, somewhere between 100 and 200 A.D.
Soooo... Ptolomy wins!! by 14 centuries !!!!
What Model of the universe do you use today?
The current model of the solar system is the "heliocentric system" meaning sun is the center of the solar system.
Hope this helps :)
What was ptolemy view on the solar system?
Ptolemy was an early Greek astronomer, and as most people believed, Ptolemy thought the solar system was geocentric. This meant that Earth was at the center, it was the most important thing, and that all celestial bodies circled it.
How did Copernicus disprove ptolemy's theory about universe?
Copernicus proposed a heliocentric model of the universe, with the Sun at the center and the planets orbiting around it, while Ptolemy's model placed the Earth at the center. By providing a simpler explanation for planetary motion and accurately predicting the positions of celestial bodies, Copernicus's model challenged the complexity of Ptolemy's geocentric theory and gained acceptance over time.
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 did Ptolemy explain planet motion?
Ancient astronmers used shell theory. The earth was center, then came the moon, planets and sun, then other stars. At first it was a circular system. It seemed more "perfect", that degenerated into ellipses as the mathematics didn't work out.
What did Galileo find in his scientific observations that convinced him that Ptolemy had been wrong?
When Galileo observed that there are satellites which orbit the planet Jupiter, this was clear evidence that not everything orbits the Earth.
Why did ptolemy believe that earth was center of the universe?
Because from our point of view, it looks like the Sun and Moon and stars rotate around the Earth when really they don't. From an observer's viewpoint, the Earth appears to be standing still.
It was not until the development of the modern tools of astronomy (mathematics, telescopes) that the movements of the Earth, rotation and revolution, were found to produce the observed motions in the sky.
Yes, this is true.
What was the foundation of ptolemys deocentric model the universe?
The geocentric model stated that Earth was the center of the universe, and all other bodies revolved around it.
Ptolemy thought that the rest of the universe spun in nested circles around the Earth, with the Sun and stars much closer than they actually are.
Why was the Egyptian art in tombs 2d and not 3d or frontal portraits?
Ancient Egyptian depictions of people were strictly governed by tradition and religion, as well as purely practical considerations.
The rule was that each individual part of the human figure must be shown from its most recognisable viewpoint, even if this meant showing the eye (for example) as if seen from the front, but the rest of the face is seen in profile (from the side). Look closely at ancient Egyptian paintings and you can see this is true. An eye seen from the side would have been more difficult to understand.
The same applies to shoulders - they make most sense when seen from the front, but the rest of the torso and legs are always shown from the side. This does not mean that ancient Egyptians walked around in a peculiar pose - they walked exactly like everyone else.
Frontal portraits are rare in Egyptian art, but they do exist. They are usually reserved for musicians, acrobats and other entertainers, who were not thought to have any status - so it didn't matter if they were shown differently.
Painting "three dimensionally" on a two-dimensional surface is all about shadow and highlights, light and shade, tonal modelling and understanding perspective. None of these things were known to Egyptian artists, who continued the same flat style of painting for thousands of years and never felt any need to change.
Caesarion was born in Egypt on June 23, 47 BC and died in Alexandria, Egypt in 30 BC. He was the son of Cleopatra, who claimed the father was Julius Caesar.
