Proposition 3. The circle in the moon which divides the dark and the bright portions is least when the cone comprehending both the sun and the moon has its vertex at our eye. (Aristarchus of Samos)

Proposition 3. The circle in the moon which divides the dark and the bright portions is least when the cone comprehending both the sun and the moon has its vertex at our eye.

Aristarchus of Samos

Related topics

bright dark eye least moon sun vertex

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