Quote Originally Posted by Mimilu View Post
But a zodiac system works based on when the constellations are visibility due to the planet's rotation on its own axis and its rotation around a sun, versus when we pick our Guardian, which is our own choice.
Maybe if what WyrahFhurrst said about other planets being named after the twelve was accurate, this could work.
A Zodiac System doesn't have to rely on constellations, just look at the Chinese Zodiac. The "Zodiac System" in Ishgard IS the Twelve, that's what we've been told all along. Us picking our Guardian is the same things as those of us in real life being born under a certain sign. Each Race/Tribe has a guardian, just like each Town does, and for Ishgard it's Halone.

Now if the stars have any other meaning is unknown, but based on the knowledge we do have, there is no other Zodiac System, since all of Eorzea shares the same one, The Twelve.