New vs Old Zodiac: What Changed and Why It Matters

People often ask about the difference between new vs old zodiac claims after hearing that the sky has shifted over millennia. In practice, the old zodiac refers to the traditional Western sun sign dates taught for centuries, while the new zodiac points to arguments that precession has moved the constellations relative to the calendar, adding a 13th sign, Ophiuchus, and nudging sign boundaries. This article compares the old zodiac sequence and dates, the astronomical changes from precession, why your sun sign remains the same in Western astrology, and how horoscopic practice actually uses houses and seasons rather than fixed constellation sightlines.