Jyotisha (or Jyotishyam from Sanskrit , from "light, heavenly body") is the traditional Hindu system of astrology, also known as Hindu astrology, Indian astrology, and more recently Vedic astrology. The term Hindu astrology has been in use as the English equivalent of Jyotiṣa since the early 19th century, whereas Vedic astrology is a relatively recent term, entering common usage in the 1980s with self-help publications on Āyurveda or Yoga. Vedanga Jyotisha is one of the earliest texts about astronomy within the Vedas. However, historical documentation shows that horoscopic astrology in the Indian subcontinent came from Hellenistic influences, post-dating the Vedic period.