Hindu Astrology
Traditional Hindu astrology is based on the sidereal or visible zodiac, accounting for the shift of the equinoxes by a correction called ayanamsa. The difference between the Vedic and the Western zodiacs is currently around 24 degrees. This corresponds to a separation of c. 1700 years, when the vernal equinox was approximately at the center of the constellation Pisces and the tropical zodiac coincided with the sidereal one (around 290 AD, or at 23.86° as of 2000 according to N. C. Lahiri, renowned author of Lahiri's Ephemeris published from kolkata, India. The separation is believed to have taken place in the centuries following Ptolemy (2nd century AD), apparently going back to Indo-Greek transmission of the system. But earlier Greek astronomers like Eudoxus spoke of vernal equinox at 15° in Aries, while later Greeks spoke of vernal equinox at 8° and then 0° in Aries (cf. p. 16, S. Jim Tester in ref.), which suggests use of sidereal zodiac in Greece before Ptolemy and Hipparchus.
Read more about this topic: Sidereal And Tropical Astrology, Sidereal Traditions
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