If you've used other Vedic astrology apps before, you may notice subtle differences in your planet placements. This page explains why — and why we believe Raman's method is the right choice.
In Vedic (sidereal) astrology, all planet positions are calculated relative to the fixed stars — not the moving equinox used in Western astrology. The Ayanamsa is the angular difference between these two reference points.
Think of it as a calibration offset. Every Vedic astrology system applies an Ayanamsa correction to convert astronomical positions into the sidereal zodiac. The question is: which Ayanamsa value do you use?
Different scholars have calculated slightly different values based on their research and astronomical observations. The two most widely used are B.V. Raman's and Lahiri's.
The difference between Raman and Lahiri Ayanamsa is roughly 1–2 degrees depending on the year. That sounds tiny, but in astrology, degrees matter — especially for planets near the boundary of two signs.
| B.V. Raman | Lahiri | |
|---|---|---|
| Origin | Based on B.V. Raman's research into Surya Siddhanta and classical texts | Adopted by the Indian Calendar Reform Committee (1956) |
| Approach | Classical astronomical tradition — aligned with ancient star references | Government standard — chosen for consistency across India |
| Reference Star | Revati (Zeta Piscium) at 0° Aries | Spica (Chitra) at 0° Libra |
| Ayanamsa (2025) | ~22° 30' | ~24° 12' |
| Difference | ~1° 42' — enough to shift borderline planets into the adjacent sign | |
| Used By | Classical Vedic astrologers, B.V. Raman school | Indian government, most modern software defaults |
Raman's Ayanamsa is derived from the Surya Siddhanta — one of the oldest and most authoritative astronomical texts in Vedic tradition. Our entire system is built on B.V. Raman's classical framework.
B.V. Raman used this Ayanamsa for thousands of charts over a 60+ year career, with documented predictions that practitioners continue to validate today.
Our classical text references, yoga definitions, and interpretation rules are all calibrated to the Raman system. Using Lahiri with Raman-based rules would introduce inconsistencies.
Some planets may appear in a different sign compared to charts generated with Lahiri. This is most common for planets near the edge of a sign boundary (last or first 2-3 degrees).
This does not mean one is "wrong." Both systems are valid approaches to the same astronomical reality. They simply use different calibration points. What matters is internal consistency — and Kosmic is fully consistent with the Raman framework.
Want to verify? Try generating a chart for a public figure whose birth data is well-known. Compare the planet placements with published B.V. Raman charts. You'll see they match.
Dr. Bangalore Venkata Raman (1912–1998) is widely regarded as one of the most influential Vedic astrologers of the 20th century. He authored over a dozen authoritative books, founded The Astrological Magazine (1936), and brought Vedic astrology to international recognition.
His works — including Hindu Predictive Astrology, How to Judge a Horoscope, and Graha and Bhava Balas — remain essential references for students and practitioners worldwide.
Kosmic's interpretation system is built on Raman's methodology — from Ayanamsa to yoga identification to remedy prioritization. This isn't a random choice; it's a deliberate decision to stay faithful to one of the most rigorous classical frameworks available.
See the difference for yourself — generate your free chart with the B.V. Raman system.
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