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Essentials of the Copernican Solar System
The daily motion of the sun and stars is the result of the earth turning
on its axis. Copernicus assumed that the air near the surface of the earth
shares in its rotation thus preventing any "wind" from arising (this
argument had also been made by Nicole Oresme two centuries
previously) .
The sun lies at the center of the solar system with the earth being the
third planet orbiting the sun. The moon orbits the earth. Copernicus
reconciled placing the sun at the center of the solar system with his
religious beliefs by noting that the sun is the source of light and life, a
logical choice for the center of the universe.
All the planets orbit the sun in the same direction with the planets
closer to the sun going around faster. A retrograde event then becomes
the result of an inner planet overtaking and passing an outer planet.
Copernicus assumed that the shapes of the orbits are circles and that the
planets move at constant speed. (same as Ptolemy)
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His Theory was mostly ignored due to the fact
it went against popularly held scientific ideas,
relegated the earth to a secondary role in the
solar system and was not available to the
average man as it was written in Latin
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Galileo Video
http://www.youtube.com/watch?v=xsX6BeBOo
rA&feature=related
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Newton’s 3 Laws
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http://www.youtube.com/watch?v=tpbGuuG
osAY
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YouTube - The Hawking Paradox (Part 1)