Those Stars among which the Sun was, when he had reached the Northern Tropic and began to retreat Southward, were termed, from his retrograde motion, the Crab (CANCER).
As he approached, in Autumn, the middle point between the Northern and
Southern extremes of his journeying, the days and nights became equal;
and the Stars among which he was then found were called Stars of the
Balance (LIBRA).
Those stars among which the Sun was, when the Lion, driven from the
Desert by thirst, came to slake it at the Nile, were called Stars of the
Lion (LEO).
Those among which the Sun was at harvest, were called those of the
Gleaning Virgin, holding a Sheaf of Wheat (VIRGO).
Those among which he was found in February, when the Ewes brought forth their young, were called Stars of the Lamb (ARIES).
Those in March, when it was time to plough, were called Stars of the Ox
(TAURUS).
Those under which hot and burning winds came from the desert, venomous like poisonous reptiles, were called Stars of the Scorpion (SCORPIO).
Observing that the annual return of the rising of the Nile was always accompanied by the appearance of a beautiful Star, which at that period showed itself in the direction of the sources of that river, and seemed to warn the husbandman to be careful not to be surprised by the inundation, the Ethiopian compared this act of that Star to that of the Animal which by barking gives warning of danger, and styled it the Dog (SIRIUS).
Thus commencing, and as astronomy came to be more studied, imaginary figures were traced all over the Heavens, to which the different Stars were assigned. Chief among them were those that lay along the path which the Sun travelled as he climbed toward the North and descended to the South: lying within certain limits and extending to an equal distance on each side of the line of equal nights and days. This belt, curving like a Serpent, was termed the Zodiac, and divided into twelve Signs.
At the Vernal Equinox, 2455 years before our Era, the Sun was entering the sign and constellation Taurus, or the Bull; having passed through, since he commenced, at the Winter Solstice, to ascend Northward, the Signs Aquarius, Pisces and Aries; on entering the first of which he reached the lowest limit of his journey Southward.