Jyotisha is one of the six Vedangas

Jyotisha is one of the six Vedangas (auxiliary disciplines of the Vedas) and has traditionally served as the science of timekeeping, celestial observation, and calendrical calculations in India.

Indian Jyotisha is an ancient knowledge system that combines mathematical astronomy, calendar science, and traditional interpretive principles. It relies on precise astronomical calculations to determine:

• Planetary longitudes
• Nakshatras (lunar mansions)
• Tithis (lunar days)
• Ascendant (Lagna)
• Dasha (planetary period) systems

These calculations form the foundation of the traditional interpretive framework used within Jyotisha. The computational aspects are based on mathematical methods and astronomical observations, while the interpretive aspects are rooted in classical texts and centuries of traditional practice.