Labels:text | nature | astronomical object | screenshot | celestial event | full moon | moon OCR: Another popular theory held that the moon was a dense body, and like a mirror, it received all of its light from the sun. Leonardo's objection to this idea arose directly from his study of the illumination of shiny spheres. He acknowledges that a shiny sphere in fact reflects light on about half its surface, but the contrast of light and darkness causes the eye to perceive mainly the point where the light is strongest: "Taking a ball of burnished gold and placing it in the dark with a light at some distance from it . . . the eye will perceive its reflection only in a small part of its surface, and all the rest of the surface reflects the darkness which surrounds it."
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