Rahu and Ketu are two nodes of Moon and they are regarded as fullfledged planets in Vedic Astrology. They are considered as most dreaded planets due to their heavy karmic effects. If all the 7 planets are situated between Rahu and Ketu then Kaal Sarp Yog is formed.
Most of the Kalasarpa dosha effects are negative, while few can be positive too. Rahu or Ketu gives sudden positive changes which are huge and can happen overnight or within a span of a few days.
