Aristarchus of Samos Quote
The straight line joined from the centre of the earth to the centre of the moon has to the straight line cut off from the axis towards the centre of the moon by the straight line subtending the (circumference) within the earth's shadow a ratio greater than that which 675 has to 1.
Proposition 14
On the Sizes and Distances of the Sun and the Moon (c. 250 BC)
