Ketu

Ketu is the south node of the Moon — a shadow planet, the diametric opposite of Rahu. Where Rahu expands, Ketu contracts. The tail of the cosmic snake carries a distinctive territory: the karaka of medicine itself, the body's acids and intestines, the dangerous 15% spread-pattern of cancer, and the karaka of enlightenment. As the agent of Mars at mass scale, Ketu shapes pharmaceutical work, secret investigation, marriage breaking patterns, and the contemplative path to moksha.