Kal Sarp Yog
The Kal Sarp Yoga is formed when all the planets are situated between Rahu & Ketu.When all the planets are hemmed between Rahu and Ketu i.e., the moon's north node and the moon's south node Kal Sarp Yoga is formed. Complete Kal Sarp Yoga is formed only when half of the chart is unoccupied by planets. The Kal Sarp Yoga is a dreaded yoga that can cause one's life to be miserable. A person under the affliction of this yoga leads a life of pain and misfortune. If it is highly afflicted this yoga has the capacity to cancel out all the good Yoga's of the chart.
. This dosha is said to be severe when all planets are within the arc from Rahu to Ketu in their natural motion direction. There are supposed to be 12 types of Kalasarpa Doshas, based on the placement of rahu from the lagna to the 12th house. These 12 have been named after 12 fearful sounding snakes: Anant, Kulik, Vasuki, Shankhapal, Padma, Mahapadma, Takshak, Karkataka, Shankhanaad, Patak, Vishakata and Sheshanag.