Khandakhadyaka

Khandakhadyaka is an ancient Indian astronomical almanac that provides detailed calculations of celestial events, such as planetary positions, lunar phases, and eclipses. Compiled around the 7th century, it was used for precise timing of religious rituals, astrology, and astronomy. The text employs mathematical techniques rooted in Indian tradition, offering methods to predict celestial phenomena accurately. Essentially, it serves as a sophisticated guide to understanding the movements of planets and stars, combining scientific observation with mathematical modeling, and remains an important historical resource illustrating early Indian astronomical knowledge.