It is in conjunction whenever it is in the same degree as the sun: it is born when it is fifteen degrees distant from the sun: it rises when it is crescent-shaped, and this occurs twice Text, δίς. R. 4 has δεύτερον., at which times it is sixty degrees distant from the sun: it is half-full twice, when it is ninety degrees from the sun: twice it is gibbous, when it is one hundred and twenty degrees from the sun: it is twice a full moon, giving full light, when it is a hundred and fifty degrees from the sun: it is a complete moon when it is a hundred and eighty degrees distant from the sun. We say twice, because these phases occur both when the moon waxes and when it wanes. In two and a half days the moon traverses each sign.