Cross-System Comparison: QZSY vs Western vs Vedic (跨系統比較)
QZSY, Western astrology, and Vedic Jyotish are the three major traditions of real-star planetary astrology in the world. All three trace at least part of their lineage to Hellenistic astronomy and astrology (the synthesis of Babylonian observation, Greek geometry, and Egyptian calendar science that crystallized in Ptolemaic Egypt around the 2nd century CE). Understanding their shared ancestry and distinct developments enables multi-tradition practitioners to synthesize insights across systems.
Shared Hellenistic Ancestry
| Feature | Hellenistic Origin | QZSY | Western | Vedic |
|---|---|---|---|---|
| Seven Planets | Sun, Moon, Mercury, Venus, Mars, Jupiter, Saturn | 七政 — same seven | Same seven (+ modern planets) | Navagraha (+ Rahu, Ketu) |
| 12 Divisions | 12 zodiac signs | 十二次 (sidereal) | 12 signs (tropical) | 12 Rashis (sidereal) |
| Houses | 12 topical houses | 十二宮 | 12 houses | 12 Bhavas |
| Dignities | Domicile, Exaltation, Fall, Exile | 廟旺利平陷 (5 levels) | Domicile, Exaltation, Detriment, Fall | Shad Bala, Vargottama |
| Aspects | Conjunction, Trine, Square, Opposition, Sextile | 合三合刑衝六合 | Same five + minor aspects | Unique aspect system (full/partial) |
Key Divergences
- Zodiac framework: The most fundamental difference. Western astrology uses the tropical zodiac (anchored to the equinoxes, shifting relative to stars). Vedic and QZSY use sidereal zodiacs (anchored to stars, but with different boundary conventions between them). This means a 'Pisces Sun' in Western astrology may be an 'Aquarius Sun' in Vedic or QZSY.
- Interpretive lens: Western astrology interprets through psychological archetypes and geometric aspects. Vedic interprets through karma, dharma, and planetary strength calculations (Shadbala). QZSY interprets through Five Element interactions and Chinese cosmological categories.
- Outer planets: Western astrology incorporates Uranus, Neptune, and Pluto (discovered 1781, 1846, 1930). Neither QZSY nor classical Vedic includes them, though some modern Indian astrologers do.
- Nodes: All three systems include lunar nodes, but with varying emphasis. QZSY adds Purple Gas and Moon's Apogee (unique). Vedic treats nodes as full planets with Dasha periods (strongest emphasis). Western traditionally marginalizes them but modern evolutionary astrology elevates them.
Synthesis Methodology
For multi-tradition practitioners, the following synthesis approach is recommended:
- Compute all three charts from the same birth data.
- Identify converging themes: When all three systems point to the same indication (e.g., all three show strong career potential), the interpretation has maximum confidence.
- Note divergences as clues: When systems disagree, investigate why — the divergence often reveals nuance that a single system misses.
- Use each system's strength: Western for psychological depth, Vedic for karmic timing (Dasha), QZSY for Five Element balance and Chinese cultural context.