Ptolemy

Ptolemy was an Egyptian mathematician and scientist. He lived from 90 to 168 AD.

1,682 Questions
Astronomy
Copernicus
Ptolemy

How did Tycho Brahe's model the universe differ from that of Ptolemy?

Tycho Brahe used Ptolemy's model but with greater accuracy of measurement. Keplar was able to use the better data to propose the heliocentric model. Newton showed Keplar's model could be derived from Newton's law of Gravity.

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Copernicus
Ptolemy
The Solar System

What is the difference between the Ptolemy and Copernicus models of the solar system?

The difference between Ptolemy's and Copernicus's model was that, Ptolemy's model had the Earth in the middle of the Solar System, with all the other planets (including the Sun and the moons) revolving around it. In Copernicus's model, he had the Sun in the center of the Solar System.

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Ptolemy
Mapping and Cartography

What event came first Robinson projection Captain Cook maps Newfoundland Ptolemy's world map Mercator projection?

1 Ptolemy's

2 Mercator

3 Captain Cook Maps Newfoundland

4 Robinson

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Ptolemy

Ptolemy did not need be concerned about distortion from projections because his map was based on?

a flat Earth.

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Ancient Egypt
Aristotle
Ptolemy
Mathematicians

The difference between Aristotle and ptolemy?

They are funny

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Ancient Egypt
Ptolemy

What was the ptolemys model?

Ptolemy considered the solar system (and the universe) to be a set of crystal concentric spheres rotating around the stationary Earth at its centre.

On the closest sphere was the moon, then Venus and so on out to the stars on the outer sphere. At the time they didn't have any idea how incredibly big everything is.

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Ptolemy
Mathematicians

What did the writings of Ptolemy and Archimedes make obvious-?

they were great history

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Ptolemy

What object did ptolemy claim was at the center of the universe?

earth

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Ptolemy

What was an impact on geography in Mesopotamian culture?

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Aristotle
Ptolemy

Did Aristotle and Ptolemy reason that the celestial bodies must be provided with a source of motion?

it is true

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Ptolemy

How long did people believe ptolemy's theory?

People believed Ptolemy's theory for approximately 1400 years before it was challenged by Copernicus.

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Math History
Ptolemy

Who disproved geocentric theory?

Claudius Ptolemy disproved geocentric theory.

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Copernicus
Galileo
Ptolemy

Why did they believe the earth is the center of the universe?

Two common observations were believed to support the idea that the Earth is in the center of the Universe: The first observation is that the stars, sun, and planets appear to revolve around the Earth each day, with the stars circling around the pole and those stars nearer the equator rising and setting each day and circling back to their rising point; the second is the perception that as the Earth is solid and stable it is not moving but is at rest.

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Ptolemy
The Solar System

What was Ptolemy's theory?

Ptolemy's theory accounted mathematically for the movement of the planets, Sun and Moonand the stars.
However, Ptolemy thought the Earth is the center of the universe, which is wrong. Galileo helped prove that the Sun is the center of our solar system by the use of his homemade telescope. Ptolemy thought that the Sun, planets, and stars rested on crystal spheres that revolved around Earth. Ptolemy had toput in things called "epicycles" and other ideas, to make his system work.

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Ancient Egypt
Ptolemy

How do do pronounce Ptolemy?

toll-uh-mee

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Ancient Egypt
Ptolemy
Similarities Between

What are the similarities between Aristotle and Ptolemy?

They both thought the earth was in the center of the universe.

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Ptolemy

The world maps created by idrisi were different from older maps created by Ptolemy because they?

were based on the idea of a SE

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Astronomy
Ptolemy

Is the earth younger then the universe?

Considerably. The universe was very roughly 8 or 9 billion years old when the Earth formed which was about 5 billion years ago.

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Astronomy
Planetary Science
Ancient Egypt
Ptolemy

How many planets did ptolemy know about when he drew his map of the solar system?

6

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Ancient Egypt
Ptolemy

How many planets were in Ptolemy time?

60

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Ptolemy

What did Ptolemy contribute to geography?

He wrote the book Geographia. He is considered the father of Geography.

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Ptolemy

When did the ptolemy live?

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Ptolemy

What theory did Ptolemy propose?

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Ptolemy

What are the successes of Ptolemy's model?

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Ptolemy

What were the successes of Ptolemy's model?

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