Ketu is what remains of the body of Rahu.
Ketu is a headless half-planet, shadowy as Rahu
and malefic, though not as malefic as Rahu. It is therefore
considered a moksha-karak (cause of liberation from the cycle
of birth and death). It bestows spiritual tendencies, ascetism
and nonattachment to worldly desires and ambitions.
Ketu is also a half-planet that bestows wisdom,
powers of discrimination, and gyana - spiritual knowledge,
the knowledge of the self. It gives psychic abilities to its
natives and makes them masters of the healing arts, natural
healing, healing herbs, spices, foods, tantric healing, healing
of persons possessed by evil spirits, ghosts and astral forces.
Ketu natives also have the ability to go unnoticed or merge
into the crowd of common folk.
Ketu's effects are similar to those of Mars,
but this is only one way of describing the malefic effect
and power of Ketu.
Ketu can be more destructive if it is inauspiciously
positioned in the horoscopes. Ketu destroys the potency of
the planet with which it is conjunct making the planet behave
in an uncontrollable manner. It is tamasik, of hybrid generation,
malefic, awful, and devious in nature.
Ketu is neither feminine nor masculine, wind-dominated,
aged, powerful at night, animalistic, obsessive, compulsive
and unconscious in behavior. It is associated with a smoky-grey
colour and Ketu's gemstone is cat's-eye.
Ketu rules number 7 in indian