జ్యోతిష శాస్త్రమును తమిళంలో ఏమంటారు?
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 zodiac are grouped into three categories: Movable (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. Numbers and names of Nādis are identical among all four Chara signs. Among all four Sthira signs, numbers and names of Nādis are identical, but numbering is different from those in Chara and Dvisvabhāva signs. Similarly, numbering of Nādis in all four Dvisvabhāva signs are 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 of 150. Thus, there are 450 distinctive names and numbers in the full zodiac. Nādi texts use this concept of Nādi as the basic unit for prediction. That is why they are called "Nādi amshas".
Nadi