The Brihat Parashara Hora Shastra (Sanskrit: बृहत् पराशर होरा शास्त्र; IAST: bṛhat parāśara horā śāstra; abbreviated to BPHS) is the most comprehensive extant Śāstra on Vedic natal astrology, in particular the Horā branch (predictive astrology, e.g. horoscopes). Though ascribed to Maharṣi Parāśara, the origin and date of the original composition is unknown. The most popular version of the BPHS consists of 97 chapters, a 1984 translation by R. Santhanam. Source: Wikipedia (en)