sec. III a. C.
ARATUS, Phaenomena, 476
When you observed the sky split all the way round by a broad circle, or someone else standing beside you has pointed out to you that star-emblazoned wheel ( men call it the Milk) no other circle that rings the sky is like it in coulor, but two of the four are equal to it in size, while the others as they turn are much smaller.
