The Lunar Nodes

Rahu and Ketu are the ascending and descending lunar nodes — the two points in space where the Moon's orbital path crosses the ecliptic (the apparent path of the Sun as seen from Earth). They have no physical substance but their influence on eclipses is mathematical certainty: solar and lunar eclipses happen only when the Sun and Moon align near these nodes. In Vedic astrology, this astronomical precision anchors their interpretive weight.

The Puranic Story

The Puranas describe the demon Svarbhanu disguising himself as a god during the churning of the cosmic ocean to obtain amrita (immortality nectar). Vishnu beheaded him as soon as Surya (Sun) and Chandra (Moon) identified the intruder — but Svarbhanu had already swallowed the nectar and could not fully die. His head became Rahu; his tail became Ketu. Both became immortal but incomplete. Their perpetual desire for revenge on the Sun and Moon is the mythological explanation for eclipses — when Rahu or Ketu swallows a luminary, an eclipse occurs, though the luminary escapes shortly after.

Rahu: The North Node

Rahu is associated with insatiable worldly desire, obsession, illusion, foreign influences, and things that fascinate but cannot ultimately satisfy. Where Rahu sits in a chart, there is amplification — often excessive amplification. A person with Rahu in the 2nd house may pursue wealth with unusual intensity; in the 10th, career becomes a consuming preoccupation. Rahu's gifts are real but never quite enough: it delivers what it promises while simultaneously inflating the appetite for more.

Rahu is considered to function like Saturn — it delivers results slowly, through persistence and indirect routes. It governs technology, research, foreigners, and the unconventional. In contemporary charts, strong Rahu placements often correlate with careers in software, film, foreign trade, and speculative finance.

Ketu: The South Node

Ketu is Rahu's complement and opposite. Where Rahu craves, Ketu releases. Where Rahu drives toward achievement in the material world, Ketu pulls toward detachment, spirituality, and the dissolution of ego. Ketu is said to function like Mars — sudden, sharp, and cutting. Its influence tends to remove: relationships, jobs, health, stability — whatever sits in the house Ketu occupies is subject to loss or transformation.

But Ketu's removals are rarely arbitrary. What it takes tends to be what was, in retrospect, preventing deeper development. Many spiritual adepts and serious practitioners of dharma have prominent Ketu placements. It governs moksha, past-life karma, esoteric knowledge, mathematics, and liberation from cycles.

The Rahu-Ketu Axis

Rahu and Ketu always sit in exactly opposite signs. This axis describes the primary karmic tension in a lifetime: the Rahu side represents what the soul is reaching toward in this life (often unfamiliar, uncomfortable, and magnetically attractive); the Ketu side represents what the soul has already mastered in previous lives (often comfortable, instinctive, and ultimately limiting). Growth in this framework means moving consciously along the Rahu direction while integrating rather than abandoning the Ketu foundation.

Rahu-Ketu Transit and Mahadasha

Rahu's mahadasha spans eighteen years in the Vimshottari dasha system; Ketu's spans seven. Both transits are considered major periods of transformation. Rahu periods often bring rapid external change, unexpected opportunities, and intensity of desire; Ketu periods often bring withdrawal, health challenges, and unexpected spiritual depth. Both are best approached with a conscious relationship to what is actually being offered rather than either grasping or resisting.