Rahu (north node) in Vedic astrology: meaning and significations

Rahu is one of the nine grahas (planets in the broad Vedic sense, including the two nodes) named in BPHS (Brihat Parashara Hora Shastra, R. Santhanam's translation), chapter 3: Surya (Sun), Chandra (Moon), Mangala (Mars), Budha (Mercury), Guru (Jupiter), Shukra (Venus), Shani (Saturn), Rahu and Ketu.

B.V. Raman, in Hindu Predictive Astrology, also lists Thama as a name, and the English label Dragon's Head.

When BPHS lists what each of the seven visible planets governs, Rahu and Ketu receive no governance in that list. PVR (P.V.R. Narasimha Rao, author of Vedic Astrology: An Integrated Approach) follows the same reading.

So Rahu's role is understood through its natural nature, its significations and its dasha (planetary period) rather than a portfolio of subjects it rules.

A traditional story connects Rahu to the divine: PVR notes that the Varaha (boar) avatara of Vishnu is said to have come from Rahu. Skybond presents this as tradition, not astronomy.

Rahu is classed as a natural malefic (krura, 'cruel', in the classical word), in BPHS chapter 3 and in PVR. PVR explains why the label matters: 'because the results given by planets are based on their inherent nature'.

This is about natural tendency, not a verdict on anyone's chart. The houses a planet rules for a given ascendant can change how it behaves, which is its functional nature, covered in a later lesson. If the words benefic and malefic are new to you, see the benefics and malefics lesson.

In BPHS's planetary cabinet (the image of the planets as a king's court), Rahu and Ketu together play the army.

BPHS also sketches Rahu's character: 'Rahu has smoky appearance with a blue mix physique. He resides in forests and is horrible. He is windy in temperament and is intelligent'.

These are traditional character sketches of the planet as an image. B.V. Raman cautions that such descriptions 'are only general in nature and should not be applied hastily'.

Rahu and Ketu are chaya grahas (shadow planets): mathematical points, the north and south nodes of the Moon. Each is where the Moon's orbit around the earth cuts the earth's orbit around the Sun, and the two are always exactly opposite each other.

Because Rahu is a point rather than a visible planet, texts disagree about its dignity (the strength a planet gains from its sign).

PVR's Table 6 gives exaltation in Gemini, debilitation in Sagittarius, own sign Aquarius and moolatrikona (a sign counted as a planet's root seat) Virgo. BPHS chapter 47, its dasha chapter, gives exaltation in Taurus, moolatrikona Gemini and own sign Aquarius, with some sages giving Virgo as the own sign.

B.V. Raman places exaltation at 20 degrees of Taurus. Skybond's engine uses exaltation in Taurus and debilitation in Scorpio, and gives Rahu no own sign.

Other texts differ; Skybond presents each view without picking a winner.

Skybond's engine takes sign rulership from the seven visible planets: the twelve signs are ruled by the seven visible planets (Mars rules Aries and Scorpio, Venus Taurus and Libra, Mercury Gemini and Virgo, the Moon Cancer, the Sun Leo, Jupiter Sagittarius and Pisces, Saturn Capricorn and Aquarius).

So in Skybond's chart Rahu rules no house for your ascendant (lagna); the engine never treats the nodes as house lords.

A karaka is a significator, literally 'one who causes': a planet read as standing for a theme in a chart. PVR's Table 16 lists Rahu's natural significations (naisargika karakatwas) together with the house each theme is read from: occult knowledge (8th house), and pilgrimages and going abroad (9th house).

Rahu rules three nakshatras (lunar mansions, segments of the Moon's path): Ardra, Swati and Shatabhisha.

In Vimshottari dasha, the dasha (planetary period) system PVR calls the most popular, Rahu's mahadasha (main period) lasts 18 years of the 120-year cycle.

Rahu always moves backwards (east to west) through the signs, taking about 18 months per sign, according to B.V. Raman. Because of that backwards motion, PVR's chara karaka method (a way of ranking planets by degree) measures Rahu's degree from the end of his sign.

BPHS's chapter 3 sketch describes Rahu as smoky in appearance with a blue-mixed physique, residing in forests, horrible, windy in temperament and intelligent. Treat this as a traditional character image of the planet, not a description of any person.

B.V. Raman cautions that such descriptions 'are only general in nature and should not be applied hastily'.

A practical starting sequence: find Rahu's sign, then its house counted from your Vedic ascendant (lagna), then its dignity by the text you follow (remembering the texts differ), then the themes it signifies. In Skybond's chart Rahu rules no house; its house lords come from the seven visible planets.

Skybond's chart shows each planet's sign, house, degree, nakshatra and pada, dignity, whether it is retrograde or combust, and which houses it rules for your lagna, with Vimshottari dasha for timing.

One caution worth keeping, from OnlineJyotish: treat interpretations 'as traditional associations rather than promises'.