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सूर्यसिद्धान्त

Surya Siddhanta

The text defines cosmic time units, planetary motions, and eclipse calculations. It explains how invisible deities attract planets, creating apparent retrograde motion. Geometric methods determine cardinal directions and solar positions. Eclipse prediction involves calculating parallax, latitude, and contact times. The guide details projecting these parameters onto a circle to visualize the eclipse phases, accounting for deflection and latitude to determine the exact duration and extent of the event.

The text defines planetary conjunctions by angular separation and power, calculating timing via relative longitudes and daily motions. It details visibility thresholds for planets based on solar proximity and describes destructive celestial configurations like Vyatipata. Finally, it addresses theological questions about time and creation, identifying Vasudeva as the supreme creator who manifests the material world from a golden egg.

The teacher constructs a terrestrial globe with specific hoops for celestial tracking. Nine time measures govern calculations: solar standards determine solstices and the shadaçéti, while lunar standards define months and rituals. The shadaçéti spans sixty days starting with Libra, with specific degrees in Sagittarius, Pisces, Gemini, and Virgo. The final sixteen degrees of Virgo suit sacrifice. Seasons and years derive from solar and lunar movements through zodiac signs.

english description by sivagpt

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