. . .

. . .

IN BOTH ASTROLOGY AND HISTORICAL ASTRONOMY, THE ZODIAC (GREEK: ΖῳΔΙΑΚΟΣ, ZŌIDIAKOS)

IS A CIRCLE OF TWELVE 30° DIVISIONS OF CELESTIAL LONGITUDE THAT ARE CENTERED UPON THE ECLIPTIC, THE APPARENT PATH OF THE SUN ACROSS THE CELESTIAL SPHERE OVER THE COURSE OF THE YEAR.

 

[...] THE CONSTRUCTION OF THE ZODIAC IS DESCRIBED IN PTOLEMY'S VAST 2ND CENTURY AD WORK, THE ALMAGEST.