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.

Proposition 3

On the Sizes and Distances of the Sun and the Moon (c. 250 BC)

Aristarchus of Samos Quotes

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...

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...

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...

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...