Ketu (Sanskrit: केतु, IAST: Ketú) () is the descending (i.e. 'south') lunar node in Vedic, or Hindu astrology. Personified as a deity, Rāhu (, the ascending (i.e. 'north') lunar node) and Ketu are considered to be the two halves of the immortal asura (demon) Svarbhanu, who was beheaded by the God Vishnu.
