Kaal Sarpa as the name imply consist of two words-Kaal (death) and Sarpa (snake). In Astrology Rahu is considered as Dragon Head or Snake head and ketu as Dragon tail. Thus Kaal sarpa dosha is believed to form in a chart when this serpentine axis entangles itself around other planets and hence constrict and disrupt the planetary radiations. In other words when all seven planets are hemmed in Rahu-Ketu axis in their natural motion direction Kaal Sarpa dosha is formed. This dosha is often associated with troubles and posing death like situations for native.