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XV. Astronomy Index
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Epicurus perhaps saw the shadows cast by columns on the walls in front of them equal in diameter to the columns from which the
shadows were cast; and the breadth of the shadows being parallel from beginning to end, he thought he might infer that the sun also was directly opposite to this parallel and that consequently its breadth was not greater than that of the column; not perceiving that the diminution in the shadow was
insensibly slight by reason of the remoteness of the sun. If the sun were smaller than the earth, the stars on a great portion of our hemisphere would have no light, which is evidence against Epicurus who says the sun is only as large as it appears.
150:460 : In the original the writing is across the diagram.
