Labels:text | screenshot | font OCR: namely f m, who see of the sun no more than the part a n or the part m r." Leonardo works here to explain why the light of the moon is less bright than the light of the sun and why the moon reflects an uneven brightness-a question dating from antiquity. By the 15th century, everyone agreed that the moon was illuminated primarily by reflected sunlight. Leonardo speculates on the moon's composition, knowing only that it appears shiny and reflective when seen from the earth.
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