Nadi Astrology (also: Naadi astrology or Nadi Josiyam) is a form of astrology practised in Tamil Nadu, India. It is based on comparing thumbprints with ancient religious texts.
According to Ancient Indian myth, thousands of years ago sages had the power to look in the past and future of the entire universe, and recorded the future of people who were living or going to live. There are different schools of thought as to the author. Some say that they were written by Lord Vinayaka who is the Hindu god worshipped at the start of each and every work. Others claim that they were written down by different saints, who had divine revelations, on palm leaves (olzha). Some of the saints were Agasthiya, Brighu, Kausika and Brahma. This school of astrology was made famous by astrologers around the Vaitheeswaran Temple in the state of Tamil Nadu. The language of choice for the saints was Vatta Ezhuthu, which is an ancient script of the Tamil language. The predictions were written in verse and are subject to interpretation. This is an art passed down the years from one generation to the other.
It is said that these predictions were made for all human beings who have lived or will ever live but then a lot of the manuscripts have been destroyed or lost. Very few remain in existence now.
Astrologers take the prints of the palm of the right thumb of a male and left thumb of a female and, after some time (during which they search for matching scripts) whereupon the subject will be asked by a said name whether it is theirs or not. If they say yes then the astrologer will be saying their father's name, and if they nod your head saying that it's true they will be told their whole life history from birth, including past, future, major aspects of their life (such as marriage, luck etc.) and their past life. The details that are present in the readings are pretty extensive and are said to include names, dates and events from the life of the person requesting the reading.
Nadi Astrology in fiction
A tamil television serial, Chidhambara Ragasiyam, is based on a claim that Nadi astrology has a method to cure AIDS.