Translations:On Dördüncü Lem'a/21/en

They called the points of intersection of the two circles “the head” and “the tail.” When the moon comes to the head and the sun to the tail, in the terminology of astronomy, an interposition of the earth occurs. That is, the globe of the earth passes right between the two of them and the moon is eclipsed. According to the above metaphor, “the moon has entered the serpent’s mouth.”