Astrology of the 13 Signs of the Zodiac is a book which explains a new theory in this ancient field of study. It was prompted by the fact that Western Astrology has outlived its lifetime and its elements have been rendered obsolete by its cousin, the science of Astronomy. The precession of the equinoxes, that is, the movement of the point of intersection of the celestial equator by the ecliptic by 50.2" (seconds of a degree) each year, prompts corresponding discrepancies in the predictions of astrology, which move further and further away from reality with each passing year. Since 100 A.D., when Claudius Ptolemy wrote his Tetrabiblos, the zodiac constellations have moved approximately 29.2° across the sky, enough to ensure that the predictions of Western Astrology are completely misguided. The Astrology of the 13 Signs of the Zodiac takes into account all available modern scientific information regarding the actual positions of the 13 Zodiac constellations and offers Astrology a way out. The only reasonable path now available to it is the acceptance of the 13 Signs of the Zodiac and the new theory, on the basis of which the Moon and the Sun are given their rightful place. In 13 Zodiac Sign Astrology, the Ascendant is represented by the position of the Moon, the celestial body which truly affects our lives, and not by some distant constellation. Lastly, sunspots, which have a well-documented impact on the Earth and its people, take on an important role in the New Astrology. Only the Astrology of the 13 Signs of the Zodiac is firmly grounded in the sciences, and particularly in Astronomy. It recognizes the influence that the planets have over our lives through their interactions with the Sun and the disturbances they cause in its magnetic field, and the effect this has on the magnetic field of the Earth itself.