Zodiac (comics) from astrology, with each member adopting the persona of a sign of the zodiac, being twelve in all. The group members share leadership of the organization, with the position rotating just as the astrological zodiac changes. When not united as a group, the members of Zodiac are all based in different cities throughout the United States. Dedicated to economic and political domination of the world, the group uses any means to accomplish this, including subversion; extortion and mass murder. Lone member Scorpio is the first member to debut in the Marvel Universe, first appearing in the title "Nick Fury, Agent
Zodiac late Antiquity, by which time Ptolemy's influence was widely established. Ptolemy clearly explained the theoretical basis of the western zodiac as being a tropical coordinate system, by which the zodiac is aligned to the equinoxes and solstices, rather than the visible constellations that bear the same names as the zodiac signs. The Hindu zodiac uses the sidereal coordinate system, which makes reference to the fixed stars. The Tropical zodiac (of Mesopotamian origin) is divided by the intersections of the ecliptic and equator, which shifts in relation to the backdrop of fixed stars at a rate of 1° every 72 years,