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zodiac





constellations of the zodiac
Constellations of the zodiac
A band around the sky about 18 wide, centered on the ecliptic, in which the Sun, Moon, and planets move.

The band is divided into 12 signs of the zodiac, each 30° long, that were named by the ancient Greeks after the constellations that used to occupy these positions; "zodiac" means "circle of animals," and only Libra is inanimate. Over the past 2,000 years, precession has moved the constellations eastward by over 30° so that they no longer coincide with the old signs.

The 12 constellations of the zodiac are:



Related categories

   • CELESTIAL MECHANICS
   • OBSERVATIONAL ASTRONOMY