"received the answer which one Cleostratus gave many years ago to a silly fellow"

The Moon
GNU Free Documentation LicenseThe Moon - Credit: Luc Viatour
Cleostratus (c. 548 BC to 432 BC) was an astronomer in ancient Greece.  He is believed by some scholars to have introduced to Greece the zodiac and the solar calendar, from Babylonia.  The crater Cleostratus on the moon is named after him.