How AI Reads Your Kundli: Swiss Ephemeris, Logic Engine & Chart Analysis Explained

When you ask an AI astrologer to read your kundli, a complex series of calculations and analysis happens in milliseconds. Unlike traditional astrologers who manually calculate planetary positions and reference books, AI systems combine astronomical precision with structured chart analysis to deliver instant, personalized predictions. Let's break down exactly how this works.

Step 1: Precise Astronomical Calculations with Swiss Ephemeris

The foundation of any accurate kundli is precise planetary positions. AI astrology platforms like Jyotir AI use Swiss Ephemeris — an open-source astronomical library developed by Astrodienst AG that's considered the gold standard in astrology software.

Swiss Ephemeris provides:

• Planetary positions accurate to fractions of an arc-second
• Historical data from 5401 BCE to 5399 CE
• All major celestial bodies: Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn, plus Rahu/Ketu (lunar nodes), Uranus, Neptune, Pluto
• House calculations using various systems (Whole Sign, Placidus, Equal House, etc.)

When you enter your birth details (date, time, location), the AI immediately:

1. Converts your birth location to precise latitude and longitude coordinates
2. Determines the timezone offset at your birth (accounting for historical timezone changes and daylight saving time)
3. Converts local time to UTC (Coordinated Universal Time)
4. Calls Swiss Ephemeris with these parameters to calculate exact planetary positions
5. Computes the Ascendant (Lagna) — the zodiac sign rising on the eastern horizon at your birth moment
6. Calculates all 12 house cusps based on the Ascendant

This entire process takes less than 100 milliseconds. The result is a complete birth chart with planetary longitudes, house placements, nakshatras (lunar mansions), and ayanamsa adjustments for Vedic (Sidereal) astrology.

Step 2: Logic Engine Extracts Chart Data

Once the birth chart is calculated, the Logic Engine systematically analyzes the chart to extract all astrologically significant data. This is a rule-based engine that applies classical Vedic astrology principles (from texts like Brihat Parashara Hora Shastra) to your computed chart.

The Logic Engine outputs:

• Yogas — beneficial and challenging planetary combinations (Raj Yoga, Dhana Yoga, Gajakesari Yoga, etc.)
• Doshas — Mangal Dosha, Kaal Sarp Dosha, Pitra Dosha, and other afflictions with severity assessments
• Dasha/Antardasha periods — Vimshottari Dasha timeline with start/end dates and house lordships for each dasha lord
• Planetary aspects — all major aspects and conjunctions between planets, with their significations
• House lordships — which planet rules each of the 12 houses, and where each lord is placed

When you ask a question like "What does Mars in 10th house mean for career?", the Logic Engine has already extracted that Mars is your 10th house occupant, identified its lordships (e.g., 3rd and 10th lord for an Aquarius Ascendant), detected any yogas Mars participates in, and computed your current dasha period. All of this structured data is passed to the AI in milliseconds.

Step 3: AI Generates Personalized Interpretation

Now the AI has:

• Your precise birth chart with all planetary positions
• Structured chart data from the Logic Engine (yogas, doshas, dashas, aspects, lordships)
• Your specific question

A large language model (LLM) like LLama 70B is then prompted with:

The LLM then generates a personalized answer that:

• References your specific planetary placements and lordships
• Explains how yogas and doshas in your chart affect the question
• Provides predictions grounded in classical Vedic astrology rules
• Ties analysis to your current dasha/antardasha period

Step 4: Anti-Hallucination Safeguards

A critical challenge with AI is hallucination — when the model fabricates information that sounds plausible but is false. For astrology, this is unacceptable.

Jyotir AI implements several safeguards:

• Mandatory chart grounding: Every claim must reference specific chart data (e.g., "Mars in your 10th house as 3rd and 10th lord...")
• Structured data input: The AI receives pre-computed yogas, doshas, and lordships from the Logic Engine — it cannot fabricate chart placements
• Logic Engine verification: The chart data the AI sees is computed deterministically from Swiss Ephemeris positions, ensuring mathematical accuracy
• Transparent data: You can see all the chart data (yogas, doshas, dashas, aspects) that the AI uses to form its analysis

Real-World Example: Complete Flow

Let's trace a complete interaction:

1. User enters birth details: April 15, 1990, 2:30 PM, Mumbai, India
2. Swiss Ephemeris calculates: Lagna in Leo, Mars in Capricorn (10th house), Moon in Libra (3rd house), etc.
3. Logic Engine extracts: Mars is 4th and 9th lord in 10th house (Raj Yoga), currently in Jupiter Mahadasha (1st and 5th lord), no Mangal Dosha, Gajakesari Yoga present
4. User asks: "Will I succeed in my career?"
5. AI generates response: "Your chart shows Mars in the 10th house as your 4th and 9th lord, forming a powerful Raj Yoga. Mars as a yogakaraka for Leo Ascendant makes this placement excellent for career success — leadership abilities, courage, and success in competitive fields. Your current Jupiter Mahadasha (1st and 5th lord, age 28-44) further amplifies these effects as Jupiter aspects Mars from your 2nd house. Careers in engineering, management, sports, or administration are especially favored."

Total time: ~2-3 seconds from question to complete answer.

Conclusion: Why This Matters

Understanding how AI reads kundlis helps you appreciate both its strengths and limitations:

Strengths:

• Astronomical accuracy through Swiss Ephemeris
• Systematic extraction of yogas, doshas, dashas, aspects from any chart
• Consistent application of astrological rules (no human bias)
• Complete transparency — you see all chart data the AI uses

Limitations:

• Cannot provide intuitive insights that come from human experience
• Bound by the rules encoded in the Logic Engine (if a rule is incomplete, AI analysis may be limited)
• May miss nuanced interpretations that experienced astrologers notice

The future of astrology isn't AI replacing human astrologers — it's AI augmenting them. AI handles calculations, chart analysis, and consistency. Humans provide intuition, empathy, and experiential wisdom. Together, they offer the best of both worlds.