Why your sign is different in Vedic astrology

You have read your star sign in magazines for years. Then an Indian astrologer, or a Vedic app, tells you that you are actually the sign before. Nobody made a mistake. The two systems measure the zodiac from different starting points.

Two zodiacs

Western astrology uses the tropical zodiac. It starts Aries at the March equinox, the moment day and night are equal, every year. The signs are tied to the seasons.

Vedic astrology, or Jyotish, uses the sidereal zodiac. It ties the signs to the fixed stars behind them. Because the Earth wobbles slowly on its axis, the equinox drifts backward against the stars by about one degree every 72 years. Over many centuries the two zodiacs have pulled apart.

The gap is now about 24 degrees

The difference between the two is called the ayanamsa. The most widely used version in India, Lahiri, puts it at a little over 24 degrees today. Each sign is 30 degrees wide, so if your Sun sits in roughly the first 24 degrees of a Western sign, it falls in the previous sign in Vedic astrology. A Western Taurus born in late April is usually a Vedic Aries. Someone born near the end of a sign often keeps the same sign in both.

Sun sign, Moon sign and rising sign

The bigger difference is what each system puts first. Magazine astrology in the West is built around the Sun sign. Vedic astrology puts more weight on the Moon sign, called the rashi, and on the ascendant or lagna, the sign rising on the eastern horizon at the moment you were born.

• Sun sign: your core identity and drive in Western astrology.
• Moon sign: your emotional nature. The main sign in Vedic astrology, and the basis of kundli matching and daily predictions.
• Rising sign or lagna: how you meet the world, and the starting point for the twelve houses in both systems.

The rising sign changes about every two hours, which is why both traditions ask for an accurate birth time.

Nakshatras

Vedic astrology also splits the sky into 27 nakshatras, or lunar mansions, each about 13 degrees 20 minutes wide. Your Moon nakshatra is used for naming traditions, for the Vimshottari dasha timeline of life periods, and for kundli matching. Western astrology has no direct equivalent.

Which one is right?

Neither is a correction of the other. They are two long traditions that answer slightly different questions. Western astrology leans toward psychology and personality. Vedic astrology leans toward timing, life periods and practical decisions. Plenty of people find it useful to look at both.

Palmastra calculates both charts from the same birth details. Switch between Western and Vedic in Settings, or read them side by side on the Chart tab.