A circle beyond the zodiac, bearing sections with the same names as the signs, containing defined groups of fixed stars, known as constellations. Ancient astrology had only forty-eight named constellations, although modern astronomers have named many more for convenience of location. There are no fixed stars in the zodiac; only planets inhabit the zodiac. Signs should not be confused with constellations, even though for historical reasons they may bear the same name. See also Lunar Mansions, which are based on Asterisms, or minor constellations.