in no textual authority. Both the Digambara and Shvetambara believe that the "purest" Jain teachings were contained within the Purvas, which have been mostly lost to antiquity. Of the surviving Jain scriptures, the Digambara tend to focus upon the Prakaranas; while the Shvetambara focus upon the Angas. Astronomy In Indian astronomy and astrology, Siddhanta (or Siddhantic) refers to a genre of texts that replaced the earlier tradition based on the Vedanga Jyotisha. The Siddhanta ("established theory") genre emerged around the beginning of the first millennium CE. Compared to the Vedanga Jyotisha, the Siddhanta texts discussed a wider range of topics including the nakshatras, the zodiac signs, precise calculations of the solar year, computations of planetary motions and positions, calculation of solar and lunar eclipses, and parallax. Early Indian astronomy is transmitted in Siddhantas: Varahamihira (6th century) in his Pancha-Siddhantika contrasts five of these: The Surya Siddhanta besides the Paitamaha Siddhantas (which is more similar to the "classical" Vedanga Jyotisha), the Paulisha and Romaka Siddhantas (directly based on Hellenistic astronomy) and the Vasishtha Siddhanta. References Caraka samhita vimana sthana 8/37 Hindu philosophical concepts Jain philosophical concepts Vedanta