1543 -
On the Revolutions of the Heavenly Orbs |
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| Written by Copernicus and published in 1543 after he died.
He threw out the old theories of the fixed orbs on crystalline shells, replacing
it with the idea of orbits, and the sun being the center of the solar system
with the planets rotating around it, and the stars on a fixed outer shell. |
Chapter 7 Page 295 .: 8th Edition :. |