Astronomers by Steven Lee

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Slide Notes

Astronomers

Published on Nov 19, 2015

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PRESENTATION OUTLINE

Aristotle
384-322 BCE
Aristotle beloved that earth was the center and all things spun around it. His model placed the sun, moon, planets and starts all revolving around earth.

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Aristarchus
310-230 BCE
Aristarchus was reported to have made the first heliocentric model of the universe. He attempted to measure the distance of the sun. His model was not widely accepted at the time .

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Ptolemy
100-170 CE
He believed that a celestial body traveled at a constant speed in a perfect circle.

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Copernicus
1473-1543
Copernicus felt that ptolomeys model was to complicated. He was aware that the heliocentric idea existed and used the wheels on wheels idea to help him.

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Kepler
1571-1630
Was a German mathematician and astronomer after carefully analyzing observations of the planet he realized that requiring perfectly circular rotations did not fit his observations. He formulated three principles which are today known as keplers laws.

Galileo
1564-1642
Galileo made significant improvements to the telescope. He found that earth was not the only object that could be orbited

Issac Newton
1642-1727
There is a popular story that Newton was sitting under an apple tree, an apple fell on his head, and he suddenly thought of the Universal Law of Gravitation. As in all such legends, this is almost certainly not true in its details, but the story contains elements of what actually happened.

Steven Lee