Nādi Astrology () is a form of Dharma astrology practiced in Tamil Nadu and adjacent regions in India. It is based on the belief that the present lives of many humans were foreseen by Hindu sages in ancient times. History In Tamil Nadu, the texts are mainly written in Vattezhuthu, which was an abugida script used to write Tamil up until the 12th century CE. The content of the manuscripts is often attributed to the Vedic sage Agastya who is believed to have possessed a highly developed consciousness. These ancient records of providence were made famous by practitioners around the Vaitheeshwaran Temple in the state of Tamil Nadu. First, the Naadi palm leaves are located based on thumb impressions (right for men, left for women). These Naadi leaves were initially stored on the premises of Thanjavur's Saraswati Mahal Library in Tamil Nadu. The British colonialists later showed interest in the Naadi leaves concerned with herbs and medicine, future prediction, etc. Some leaves got destroyed, and the remaining were auctioned during the British Raj (rule). These Nadi leaves were obtained by the families of astrologers at the Vaitheeswaran Temple and have been passed down the years from one generation to the other. There is also another set of astrologers claiming that the content written on the palm leaf is the conversation between Shiva and Parvathi. This is called "Shiva nadi jyotisiyam". Theory The basic concept of Nadi Astrology is "Nadi" (). There are 150 Nādis in a sign or Rāshi (Rāsi); one sign is 30 degrees of the zodiac 360. Twelve signs of the zodiac are grouped into three categories: Moveable (Chara), Fixed (Sthira), and Dual (Dvisvabhāva) signs. The nomenclature of 150 Nādis is peculiar to each of these three types of signs. There are 1,800 Nādis in 360 degrees. The numbers and names of Nādis are identical among all four Chara signs. Among all four Sthira signs, the numbers and names of Nādis are identical, but the numbering is different from those in Chara and Dvisvabhāva signs. Similarly, the numbering of Nādis in all four Dvisvabhāva signs is identical among themselves but different from Chara or Sthira signs. For instance, the first Nādi in Chara signs such as Aries is Vasudhā Nādi, but in Sthira signs the order is reversed and Vasudhā is 150th Nādi. In Dvisvabhāva signs such as Gemini, Vasudhā is 76th Nādi; that is, from the middle