Ketu – South Node of Moon
Om Chitravarnaya vidmahe
Sarpa Roopaya Dheemahe
Tanno Ketu Prachodayat
Ketu, the opposite node to Rahu, came into being during the churning of the Ocean of Milk. The last gift of that churning was the emergence of the God of Healing, Dhanvantari, with the pot of amrit, the nectar of immortality. Ketu and Rahu were whole at that time, in the form of a demon known as Swarbharnu, who engaged in subterfuge to obtain the nectar whilst it was being served out by the enchantress Mohini. The deception was discovered by the Sun and Moon, who ran tale-telling to the great God Maha Vishnu, who promptly sent his discus and separated the head from the body; the body is today known as Lord Ketu, South Node of the Moon.
Ketu has very poor reputation garnered over the ages and in narrative, yet, is disposer of intelligence of a deep order. Ketu is also disposer of Spiritual Intelligence.