Solar House System Analysis (Surya Lagna) #

Objective #

To evaluate the efficacy of Solar House Systems (where the Sun defines the 1st House) as a predictive tool when birth times are unknown or unreliable. This project tests whether "Archetypal Planets" (e.g., Mars for Athletes) appear in "Archetypal Houses" (e.g., 10th House of Career) more often than random chance when using the Sun as the chart anchor.

Methodology #

• Sample: 86 Celebrities from Project 6 (Science, Arts, Politics, Sports, Literature, Philosophy).
• Systems Compared:
  1. Solar Whole Sign: The Sign containing the Sun is the 1st House (0° to 30° of that sign).
  2. Solar Equal House: The Degree of the Sun defines the 1st House Cusp (e.g., Sun at 15° Leo -> 1st House is 15° Leo to 15° Virgo).
• Statistical Approach:
  • Archetype Mapping: Defining target houses/planets for each category (e.g., Politics -> Sun/Jupiter in 10th/11th).
  • Bayesian Inference: Calculating the Bayes Factor (Likelihood Ratio) of the observed Hit Rate against a random baseline (~25%).

Findings #

• High Efficacy: Both Solar House systems produced Hit Rates (~31-32%) significantly above the random baseline (25%).
• Strong Evidence: Bayes Factors > 17 indicate "Strong Evidence" that Solar House placements are not random.
• System Comparison: Solar Equal House (BF 23.53) slightly outperformed Solar Whole Sign (BF 17.00), suggesting the exact degree of the Sun is a potent sensitive point.

Conclusion #

The "Surya Lagna" (Sun Chart) is a valid and powerful technique for archetypal analysis. It allows for meaningful astrological study of historical figures or groups where birth times are unavailable.

Files #

• analysis.py: Main analysis script using Project 6 data.
• RESULTS.md: Detailed statistical breakdown.
• solar_house_analysis.png: Visualization of hit rates vs baseline.

Data Provenance #

House Systems #

• Source: Generated Coordinates.
• Method: Comparison of Placidus, Koch, and Equal house cusps via Swiss Ephemeris.