Vedic astrology
Rahu
Also known as: Rahu and KetuRahu e KetuNorth NodeDragon's Headshadow planet Rahuchhaya graha
In Vedic astrology (Jyotish), Rahu is the shadow planet corresponding to the Moon's North Node, the point where the Moon's orbit crosses the ecliptic, associated with ambition, hunger for the new and the urge to cross boundaries.
Rahu is not a physical body. It is a geometric point: the place where the Moon, moving along its orbit, crosses the ecliptic from south to north. Exactly 180 degrees away lies the other node, Ketu. That is why Rahu and Ketu are always discussed together, as a single axis. In Vedic astrology both points belong to the nine grahas and are called chhaya grahas, or shadow planets.
The nodes move backwards through the zodiac. The mean node regresses steadily and completes a full circuit in about 18.6 years, so Rahu spends roughly a year and a half in each sign. Jyotish usually works with the mean node, and AstroSensus, in its Vedic view, also calculates Rahu as the mean node and places Ketu exactly opposite.
The myth tells of the churning of the ocean of milk, from which the gods drew the nectar of immortality. The demon Svarbhanu disguised himself and drank some, but the Sun and the Moon recognised him and Vishnu cut off his head. The head became Rahu and the body became Ketu. Ever since, Rahu chases the lights of the sky, which tradition links with eclipses. Astronomically, eclipses do happen only when a New or Full Moon falls close to the nodal axis.
In interpretation Rahu stands for a hunger for experience, ambition and fascination with what is foreign, new and unconventional. It is a head without a body: it desires but is hard to satisfy. The house Rahu occupies in a chart points to an area of life with strong striving, sometimes excess, illusion or a sense that something is always missing. Rahu is also linked with foreign lands, technology, new media and people from outside one's own circle.
Rahu is said to act like the lord of the sign it occupies, and it strongly colours any planet it conjoins. Among the nakshatras, Rahu rules Ardra, Swati and Shatabhisha. In the Vimshottari dasha system, the Rahu period lasts 18 years and is often described as a time of marked change, ambition and unexpected turns.
Rahu is not evil by nature. Vedic astrologers count it among the difficult planets because it amplifies desire and restlessness, yet the same impulse can lead to courage, innovation and stepping outside convention. The Western counterpart is the North Node, read more as a direction of growth than as a planet with its own character. These are separate traditions and are best read separately.
The Rahu and Ketu axis works best as a whole: Rahu shows what pulls you forward, Ketu what is already familiar and easier to release. The useful question is not whether Rahu is good, but what you are really seeking in the area it highlights.
Frequently asked questions
What is Rahu in Vedic astrology?
Rahu is the Moon's North Node, the point where the lunar orbit crosses the ecliptic, treated in Jyotish as a shadow planet. It is not a physical body, but it has its own meaning, rules three nakshatras and has an 18-year period in the Vimshottari dasha system. It is associated with ambition, desire for the new, fascination with the foreign and restlessness.
What is the difference between Rahu and Ketu?
Rahu and Ketu are the two ends of the same nodal axis, always 180 degrees apart. Rahu, the demon's head in the myth, symbolises desire, ambition and a turn toward the new. Ketu, the headless body, symbolises detachment, spirituality and what is already known. They are read together because their houses always face each other.
Is Rahu always bad?
No. Vedic tradition counts Rahu among the difficult planets because it amplifies desire, restlessness and a tendency to excess. The same drive can support courage, innovation, contact with other cultures and breaking out of old patterns. Much depends on the sign, house and conjunctions, and on how consciously a person engages with the themes Rahu brings up.
How long does Rahu stay in one sign?
The mean node travels backwards through the whole zodiac in about 18.6 years, so Rahu stays in each sign for roughly a year and a half. Ketu moves through the opposite sign at the same time, which is why a nodal transit always affects two opposite houses of a chart at once.