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Ancient Greek Astronomy
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Ancient Greek Astronomy

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Greek philosopher

Greek philosopher

Believed the Earth was the center of the universe

Earth was surrounded by water, air, and fire

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He thought that the moon, sun, five planets, and the stars all revolved around the Earth

He thought that the moon, sun, five planets, and the stars all revolved around the Earth

Geocentric model

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Sun is the center of the universe

Sun is the center of the universe

Heliocentric model

First to measure the distance to the sun and moon

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REVOLUTION is the cycle in which a planet orbits the sun (one year)

REVOLUTION is the cycle in which a planet orbits the sun (one year)

ROTATION is the cycle of a planet spinning on its axis; day to night (one day)

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Imaginary line on which an object rotates

Imaginary line on which an object rotates

Earths axis goes through its center from the North to the South Pole

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What is the major difference between the universe models of Aristotle and Aristarchus?

What is the major difference between the universe models of Aristotle and Aristarchus?

How is rotation different from revolution?

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Agreed with ARISTOTLES geocentric model

Agreed with ARISTOTLES geocentric model

Retrograde motion is the idea that a planet moves back and forth in a looping motion; Mars

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Heliocentric model

Heliocentric model

Expanded the ideas of Aristarchus

Identified the positions of the planets

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Spent most of his life trying to prove the theories of Copernicus

Spent most of his life trying to prove the theories of Copernicus

First to effectively use the telescope

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Roman Catholic Philosophy

Roman Catholic Philosophy

Earth and humans are the center of all things

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Why would the Roman Catholics care whether the Earth was the center of the universe?

Why would the Roman Catholics care whether the Earth was the center of the universe?

What is retrograde motion?

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What is the difference between heliocentric and geocentric?

What is the difference between heliocentric and geocentric?

What was Ptolemys theory?

Why was Galileo important?

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