Astrology | Shri Nadi Astro Nadi astrology is a divine science practiced in southern India which deciphers the past, present and future of destined humans through the text recorded on palm leaves by Hindu 18 sages/Siddhas - Agasthiyar, Idaikadar, Sattai Nathar, Pathanjali, Konganar, Kuthambai Sithar, Kamalamuni, Vanmikar, Pambatti Sithar, Sundharanadar, Sivavakkiyar, Karuvurar, Thanvanthiri, Macha Muni, Korakkar, Boghar, Thirumular, Ramathevar.