Ketu is the planet of spirituality. Ketu represents the spiritual process of evolution. Ketu is also not a material embodiment and is referred to as chaya graha (Shadow planet). Ketu is the southern point where the path of earth around sun cuts the path of Chandra. Like his counterpart Rahu, he is also the significator of any sudden event be in an accident or a lottery gain. He indicates secrecy, dissatisfaction, hidden enemies, greed, proficiency in foreign and artificial languages like computer languages. He represents foreign or alien religious believes, obsessive personality, mass tragedies and mysterious diseases. He causes abortions, rifts in married life as well as domestic problems. The difference between the significations of rahu and ketu is that the effects caused by ketu are not as severe as those caused by rahu. However, the mental agony, uncertainty are more. Ketu is considered a worldly malefic and spiritual benefic, as he causes mild amount sorrow and loss, which ultimately turns the individual to God. Ketu signifies intelligence, liberation, wisdom, non-attachment, deep insight, and psychic abilities. Regular propitiation measures to ketu removes possibility of accidents, insect bites, allergy etc., The remedial measures to ketu reduce mental worries and mysterious fears.
Ketu Yantra is used to remove the malefic effects of Ketu. When Ketu is malefic, the use of Ketu yantra is spiritually very benefic and favourable. Ketu yantra helps and indicates success in business, Victory over enemies, and all round success.Other complications caused by Ketu are loneliness, depression, allergies, difficulty of gaining recognition for hard work of efforts etc.Other Remedies: Donate a brown cow with white spots, colored blankets, or a dog to a poor young man on Thursday. Neither order to beat dog nor beat Dog yourself.
Mantra in English:
Stotra : palasa-puspa-sankasam taraka-graha-mastakam raudram raudratmakam ghoram tam ketum pranamamy aham
When translated in English, it means:
"I offer my obeisances to the violent and fearsome Ketu, who is endowed with the potency of Lord Shiva. Resembling in his complexion the flower of a palasa plant, he serves as the head of the stars and planets."