# How Vedic Astrology Differs from Western Astrology

> How Vedic (Jyotish) astrology differs from Western astrology: sidereal vs tropical zodiac, Moon vs Sun, nakshatras, dashas, and why your sign changes.

Your Western sign and your Vedic sign are usually different, and that is only the beginning. The two systems use different zodiacs, center different planets, predict with different tools, and serve different cultural purposes. Here is what actually differs and why.

## The zodiac split: stars vs seasons

The deepest difference is the zodiac itself. Western astrology uses the **tropical zodiac**, anchored to the seasons: 0 degrees Aries is the spring equinox, wherever the stars happen to be. Vedic astrology uses the **sidereal zodiac**, anchored to the actual constellations. Because of the precession of the equinoxes, the two have drifted about 24 degrees apart (the Lahiri ayanamsa), so your Vedic Sun sign is usually one sign earlier than your Western one. Neither is wrong; they measure different things.

## The Moon takes center stage

Western pop astrology asks "what is your sign?" meaning your Sun sign. Vedic tradition asks for your **janma rashi**, your Moon sign, and your **nakshatra**, the lunar mansion the Moon occupied at birth. The 27 nakshatras (each 13 degrees 20 minutes) are the fine-grained texture of Jyotish: they set your dasha sequence, your temperament (gana), and your marriage compatibility. The Moon, fast and changeable, represents the mind, which Vedic thought considers more revealing than the Sun's steady ego.

## Frequently asked questions
### Why is my Vedic sign different from my Western sign?

The two zodiacs have drifted about 24 degrees apart due to precession. Vedic astrology uses the sidereal (star-based) zodiac, Western uses the tropical (season-based) one, so Vedic placements usually fall one sign earlier.

### What is a nakshatra?

One of 27 lunar mansions, each spanning 13 degrees 20 minutes of the zodiac. Your janma (birth) nakshatra is the one the Moon occupied when you were born; it sets your dasha sequence and much of your Vedic profile.

### What is ayanamsa?

The angular difference between the tropical and sidereal zodiacs, about 24 degrees today. The Lahiri ayanamsa is the official Indian standard; others (Raman, Krishnamurti) differ by about a degree.

### Is Vedic astrology more accurate?

There is no scientific evidence for either system's predictive claims. They are different cultural technologies for meaning-making, each internally consistent.

### What are dashas?

Planetary time periods, most famously the 120-year Vimshottari cycle. Your birth nakshatra's lord sets which planet's period you are born into, and the sequence runs from there.

---
Interactive version: https://toollantern.win/vedic-vs-western-astrology/