The Panchasiddhantika is a book on astronomy written by Varaha Mihira in ancient India. This edition, translated by G. Thibaut and published in 1889, provides a comprehensive look at the five astronomical systems used in India at the time. The book covers topics such as planetary motion, eclipses, and the calculation of the length of the year. It also includes discussions on astrology and its relationship with astronomy. This edition includes footnotes and annotations by the translator to provide context and explanation for the reader. The Panchasiddhantika is an important work in the history of astronomy and provides insight into the scientific knowledge and cultural beliefs of ancient India.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.