Ayanamsa is the angular difference between the tropical (Western) zodiac and the sidereal (Vedic) zodiac — currently about 23-24 degrees — and it's the reason your Vedic sun sign often differs from your Western sun sign.
What Causes Ayanamsa: Earth's Axial Precession
The Earth wobbles on its axis like a spinning top in a slow 26,000-year cycle called axial precession. This causes the spring equinox point (the start of the Western tropical zodiac) to drift backward through the constellations at about 50 arc-seconds per year. Over 2,000 years, this drift has accumulated to about 23 degrees — enough to shift most people's sun sign back one sign.
Lahiri Ayanamsa: The Standard in Vedic Astrology
Several ayanamsa values are used by different schools of Vedic astrology, but the Lahiri Ayanamsa (also called Chitrapaksha Ayanamsa) is the official standard adopted by the Government of India in 1955. My Kundli AI uses the Lahiri Ayanamsa for all calculations. The current Lahiri Ayanamsa value (2026) is approximately 24 degrees 9 minutes.
How Ayanamsa Affects Your Chart
Because of the ayanamsa correction, your Vedic sun sign will often be the sign before your Western sun sign — for example, a Western Aries (born March 21–April 19) is often a Vedic Pisces. More importantly, all planetary positions shift by the ayanamsa value. This means your Vedic Ascendant, Moon sign, and house placements will all differ from a Western chart — often producing a more accurate reflection of your personality and life events.
Key Takeaway
Ayanamsa is not an error — it's Vedic astrology's correction for the actual astronomical positions of planets against the background of fixed stars.
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