 Hindu astrology as it stands today is inherently a study of karma, which gives it a very different foundation compared to Greek astrology.In addition to this, the predictive techniques such as Dashas (planetary and sign-based time periods), Vargas (harmonic divisions of the horoscope) are not that evolved in Greek astrology.Jyotisha, states Monier-Williams, is rooted in the word "Jyotish" which means light, such as that of sun or moon or heavenly body.