Iran Chamber Society: Iranian Personalities: Varahamihira ... "It is post-Varahamihira and based on Siddhantic astronomy. Vedic astronomy did not have zodiacal signs," says Kochhar. "Teaching astrology is different. You can certainly teach astrology if you can teach Sanskrit." (Abraham 2001) Thus, modern South Asian astrology is non-Vedic and instead based on the Iranic solar system of Varahamihira.