You know your zodiac sign. Maybe you're a Virgo, or an Aquarian. But did you know that your sign is not the same thing as the zodiac constellation that it is named after? Your sign is actually in a different part of space to the constellation of stars we can see in the sky. What? That makes no sense... or does it? In this book, The Origin and Nature of the Tropical Zodiac, researcher Dr Damien Pryor unpacks the difference between what's known among astrologers as the 'sidereal zodiac', and the 'tropical zodiac.' The sidereal zodiac, made up of the 12 constellations, is visible and real. The tropical zodiac, on the other hand, does not exist in the sense of a visible group of stars. So what is it, actually? Astronomers believe it's just a fanciful idea, with no basis in reality. Yet there are many references to the tropical zodiac in ancient Greek texts, including the writings of Ptolemy. Dr Pryor's meticulous research into these texts reveals the secret of what the tropical zodiac is, and how the teachers in the ancient Greek and Babylonian Mysteries understood it. Written in everyday language, with helpful graphics, The Origin and Nature of the Tropical Zodiac is an invaluable resource for astrologers - and anyone who has an interest in their astrological sign.