For the motion of the earth is a fact, and the apparent change of position of the fixed stars is due to the earth's motion and not to any motion of the stars themselves.
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"Astronomy is written for astronomers."
"At rest, however, in the middle of everything is the sun."
"First of all, the world is spherical. This is because the sphere is the most perfect figure of all, and it is the form of the world."
"There are three kinds of motion of the earth, as I shall demonstrate below."
"In the middle of all sits the Sun enthroned. In this most beautiful temple, could we place this luminary in any better position from which he can illuminate the whole at once?"
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