Rahu-Ketu Transit: What Each 18-Month Axis Shift Brings

Rahu and Ketu are the lunar nodes, two mathematical points always opposite each other across the zodiac. Their long-term motion is retrograde, and they change signs together roughly every 18 months, sliding the nodal line from one directed sign-pair into the next. Across the full 18.6-year cycle, the six sign axes appear in both directions, so Rahu-in-Aries/Ketu-in-Libra and Rahu-in-Libra/Ketu-in-Aries must be read with the hunger and release reversed. Each current axis activates a different pair of houses in every chart: Rahu draws attention toward the matters it occupies, while Ketu asks for release at the opposite end. Eclipse seasons during the transit highlight both ends. Whether the shift feels expansive or destabilising depends on which natal houses the new axis lights up from the Lagna and Moon.

Rahu and Ketu: The Shadow Axis

Rahu and Ketu are not planets in the ordinary sense. They have no body, no light of their own, no atmosphere or surface that an instrument could photograph. In classical Vedic astronomy they are chaya grahas, shadow grahas, and what they actually mark are the two points in the sky where the Moon's orbit crosses the apparent yearly path of the Sun. The Moon, as it travels, moves above and below the ecliptic by a small angle; those crossings, north-going and south-going, are the lunar nodes. Rahu is the ascending node, the point where the Moon climbs from south to north. Ketu is the descending node, exactly opposite, where the Moon falls from north to south. Modern astronomy describes them the same way and gives them the same physics, even if it does not personify them.

Because they are crossing points rather than bodies, the nodes have one property that no other graha shares. They are always exactly 180° apart. They cannot drift, they cannot conjoin one another, and they cannot ever be in the same sign at the same time. With Rahu on one end and Ketu on the other, the line between them is therefore a literal axis through the chart. When the nodes change signs, both ends move at once, and a single shadow line in the zodiac swings from one orientation to a new one.

This axis behaviour makes the nodal transit distinctive. A single graha occupies one sign and house at a given moment, even though its aspects may reach elsewhere; Rahu and Ketu occupy two opposite signs and houses simultaneously. The relationship between those two ends may then become an important background theme for the next eighteen months.

Read the axis as one instruction moving through the chart. Attention, fascination, hunger, and ambition gather in the house Rahu occupies, while interest recedes and detachment grows in Ketu's house, which may also undergo a quiet erosion. These are not separate events but one teaching expressed through two houses at once.

Rahu: the head, the hunger, the forward pull

In Puranic narrative, the asura Svarbhanu drank amrita, the nectar of immortality, while disguised among the devas. After Surya and Chandra exposed him, Vishnu, in the form of Mohini, severed him with the Sudarshana Chakra. The immortal head became Rahu and the body became Ketu. This classical image underlies Rahu's association with desire that survives without satiation, like a head without a stomach that can never be filled.

Whatever house and sign Rahu occupies in transit may therefore feel like an area where attention strains forward without quite catching what it seeks. The pull, energy, and achievement can all be real, but their underlying quality is hunger rather than contentment. The Rahu overview records this Puranic account and its association with eclipses.

Ketu: the tail, the release, the inward gaze

Ketu is the other half of the same immortal asura: the headless body, separated from the appetite carried by the head. Jyotish therefore reads its quality as the counterpoint to Rahu's. Rahu wants and reaches forward, while Ketu turns attention inward and is described as moksha karaka, the significator of release, completion, and the dissolution of attachment.

In transit, Ketu's house may become an area where interest quietly fades and old structures crumble. If the work is done well, what first looks like loss can eventually reveal an unexpected clarity.

The 18-Month Rhythm: Why the Nodes Move Differently

The nodes have one more peculiarity that shapes their behaviour as a transit: their long-term motion is backwards through the zodiac. The Sun and Moon advance in direct order, while the visible planets sometimes enter apparent retrograde periods. The mean lunar node, by contrast, steadily regresses from Pisces toward Aquarius, from Aquarius toward Capricorn, and onward through the sequence. This westward precession is real and comes from the gradual rotation of the Moon's orbital plane against the ecliptic. The calculated true node follows the same overall retrograde cycle but can briefly station or move direct. The lunar-node overview records the roughly 18.6-year precessional cycle, while Astrodienst explains the mean and true node distinction.

Because the nodes cover the full circle in about that span, they spend approximately a year and a half in each pair of opposite signs before stepping back into the previous pair. Indian almanacs and working astrologers therefore describe the cycle in roughly 18-month segments. The exact ingress date depends on the sidereal framework and on whether the mean or true node is used, but the larger eighteen-month rhythm remains the same.

Saturn takes about two and a half years to cross one sign, while Jupiter takes about a year. The nodal axis, by contrast, takes roughly eighteen months to swing from one orientation to the next. The shift is slower than Jupiter and faster than Saturn, but its character is different from either. Saturn pressures from outside through delay, weight, and constriction. Jupiter expands from outside through opportunity, mentorship, and grace. The nodes work from underneath, quietly rewiring the direction of desire and the location of detachment.

Why the rhythm feels invisible at first

A Rahu-Ketu transit may not announce itself through a single event at ingress. Its themes often emerge gradually as a person's interests and priorities change, and the shift can take time to recognise because the new desire feels entirely one's own.

Over the following months, a person may notice that last year's fascinations feel slightly hollow, while a new field, perhaps a study, role, community, or geography, has quietly begun absorbing their attention. The ingress marks the change in direction; the visible consequences may arrive later as habits, commitments, and relationships reorganise around it.

Why eclipses come every six months during the transit

The same nodal points that act as the axis of a transit are also the geometrical condition that produces an eclipse. A solar or lunar eclipse can occur only when the Sun and Moon are near a node. The nodes therefore "carry" the eclipse seasons with them as they move. While the nodes sit in one sign-pair, every solar and lunar eclipse during those eighteen months falls near one end of that moving nodal line. We will return to this in detail later in the article. For now, what matters is that the eclipses act as intensifiers, marking the moments inside the transit when the karmic instruction of the axis comes through with the most force.

What a "transit" of a shadow graha actually means

If Rahu and Ketu have no body, what is actually moving? It is the axis itself: the geometrical line between the Moon's two crossing points relative to the Earth-Sun plane. As that line precesses, it points through different zodiacal degrees. When Vedic astrology says "Rahu has entered Pisces," it means that this geometrical line now intersects the band of sky called Pisces.

The interpretive tradition treats this intersection as significant for the same reason the older Indian astronomical tradition does. The nodes are where the lights cross, and those crossings make eclipses possible. Read the deeper background on the two shadow grahas for the full physical and mythological picture.

Reading the Nodal Axis from Lagna and Moon

Because the nodal transit lights up two opposite houses at once, the first task in reading it is to identify, in any given chart, which two houses the current Rahu-Ketu sign-pair corresponds to. The answer is rarely a single house. It is a single pair - and the pair changes depending on which reference point you read from.

Traditional Vedic transit work uses two reference points for almost every gochar. The first is the Lagna, the rising sign at birth, which sets the 1st house and from which all twelve houses are counted in the natal chart. The second is the Janma Rashi, the natal Moon sign, from which the houses are counted again for what the tradition calls Chandra Lagna readings. Most working Jyotishis examine both and weigh the indications together.

From Lagna: the houses Rahu and Ketu now occupy

Reading from the Lagna is the more event-oriented frame. It tells you which areas of life are being externally activated. If Rahu is now transiting your 7th house and Ketu your 1st, the nodal teaching is about partnership, the public, and the other person: Rahu pulls attention outward toward relationship, recognition, and what the world reflects back, while Ketu quietly dissolves the older sense of self that had been carried. If Rahu is now in your 10th and Ketu in your 4th, the same teaching translates into career and visibility on one side, home and emotional foundation on the other.

The instruction reads cleanly across any axis. Identify the house Rahu now occupies in your natal chart counted from the Lagna; that is where the eighteen-month current of desire, ambition, and active engagement runs strongest. Identify the opposite house where Ketu now sits; that is where attention is being quietly withdrawn, and where attempts to force activity often produce frustration or unexpected dissolution.

From the Moon: how the inner field is being reshaped

Reading from the Janma Rashi is the more psychological frame. It tells you not what is happening on the outside but what is shifting inside the field of mind, memory, and emotion. The same nodal axis, read from the Moon, will land in a different pair of houses than the same axis read from the Lagna - unless the Lagna and Moon sign are the same.

Suppose a person has Aries Lagna and Moon in Capricorn. During a Rahu-in-Pisces transit, the Lagna reading places Rahu in the 12th house and Ketu in the 6th. This brings a foreign-and-spiritual emphasis to one end of the axis, with work and conflict at the other.

Count the same transit from the Moon, however, and Rahu falls in the 3rd while Ketu falls in the 9th. Courage and communication now stand at one end, with dharma and the long-term meaning of life at the other. Both readings are legitimate: the first describes external developments, while the second shows how the person's inner orientation, dreams, and emotional centre shift during the same period.

When the two readings agree, the transit lands harder

The most consequential nodal transits - the ones that genuinely reshape a life chapter - are typically those where the Lagna reading and the Moon reading point in compatible directions. If Rahu transiting from Lagna is in the 10th and from Moon also in a career-relevant house (the 6th from Moon, say, for work and service), the transit will fall heavily on professional life and feel saturated rather than partial. If the two readings point in completely different directions, the same transit will feel split: one strand of life expanding outward while another strand of inner experience quietly turns the opposite way.

The role of the dispositors

Beyond the houses, the experienced reader weighs the dispositors - the rashi lords of the signs Rahu and Ketu now occupy. If Rahu has entered Taurus, the dispositor is Venus, and the condition of natal Venus in the chart conditions how Rahu in Taurus actually expresses. A strong, well-placed Venus turns the Rahu-in-Taurus transit toward sustained wealth-building, sensory enjoyment, and material consolidation; an afflicted Venus turns the same transit toward overconsumption, financial overreach, or relationship instability. The dispositor is not the whole story, but ignoring it is a common mistake.

For a fuller treatment of how dasha periods interact with these transits - particularly how a running Rahu Mahadasha or Ketu Mahadasha magnifies the nodal transit - see the dedicated articles. The Vimshottari Dasha guide places the transit in the larger cyclical timing.

All Six Sign Axes: How Each Rahu-Ketu Direction Reads

Rahu and Ketu occupy twelve directed sign-pairs over a full cycle, because Rahu passes through all twelve rashis while Ketu always remains opposite. Those twelve placements sit on six sign axes: Aries-Libra, Taurus-Scorpio, Gemini-Sagittarius, Cancer-Capricorn, Leo-Aquarius, and Virgo-Pisces. Aries-Libra and Libra-Aries are the same axis viewed from different ends, but the interpretation changes because Rahu and Ketu have exchanged roles. The convention below shows one Rahu-first direction for each axis. When the transit returns to the same axis with Rahu and Ketu reversed, swap the Rahu-side and Ketu-side meanings rather than treating it as a new axis.

Across an 18.6-year cycle, the nodes pass through all twelve directed placements, generally spending about a year and a half in each. The order runs backwards through the zodiac, since the nodes are retrograde - so an axis-ending of Rahu-in-Aries is typically followed by an axis-beginning of Rahu-in-Pisces, not Rahu-in-Taurus.

The summary table below gives the headline themes for the Rahu-first direction shown in each row. The detailed sub-sections then explain the themes traditionally associated with each position and show how the reading becomes more individual once the natal Lagna and Moon are considered.

Rahu in Aries, Ketu in Libra

The Aries-Libra axis activates the most basic polarity in the zodiac: the self alone and the self in relation. Rahu in Aries pulls attention sharply toward independence, identity assertion, and the willingness to begin things alone. At the same time, Ketu in Libra dissolves older habits of accommodation, smoothed-over compromises, and the polite self built for the comfort of others.

For many people, this transit creates a long-running internal demand to stop deferring. It may mean starting projects without waiting for a partner, making decisions without polling the room, or holding an opinion without apology.

From the Lagna, the axis lights up whichever houses correspond to Aries and Libra in the chart. For an Aries Lagna the axis runs through the 1st and 7th, and the eighteen months become a defining period for marriage, business partnership, and the very definition of the self in front of the world. For a Cancer Lagna the same axis runs through the 10th and 4th, and the transit pushes career and public role forward while quietly loosening the hold of the family home and inherited emotional patterns. For a Capricorn Lagna it runs through the 4th and 10th in the opposite direction - home and mother are forward, career is being released or restructured.

The dispositors matter especially here. Mars rules Aries; Venus rules Libra. The condition of natal Mars conditions how Rahu-in-Aries actually expresses, and natal Venus conditions how Ketu-in-Libra dissolves the partnership patterns. A strong, dignified Mars makes the self-assertion clean and decisive. An afflicted Mars makes the same energy spill out as anger, impulsive action, and the kind of relationship friction that ends partnerships clumsily rather than maturely. The classical counsel during this axis is to use the courage Rahu-in-Aries offers, while letting Ketu-in-Libra release relationship patterns without forcing dramatic exits.

Rahu in Taurus, Ketu in Scorpio

The Taurus-Scorpio axis sets one's own resources against those shared with others. Rahu in Taurus draws attention toward consolidation, ownership, sustained wealth-building, sensory enjoyment, and slow accumulation, whether of land, savings, a well-fed body, or beautiful surroundings. At the same time, Ketu in Scorpio loosens the grip of shared resources, inherited assets, deep intimacies, occult fascinations, and crisis-driven identities.

Many people describe this period as one in which the relief of “just owning my own life” finally becomes available, while older entanglements with a partner's money, family inheritances, or intense investigative work quietly fade.

This axis tends to be one of the more grounding, especially compared with the volatile Aries-Libra or dramatic Leo-Aquarius. Taurus is a fixed earth sign, so Rahu's desire is amplified toward stability rather than scatter. Attention often turns to the practical mechanics of money: investment, savings, real assets, a marketable craft, or a small business that can be built. Yet the gift carries its own risk, since consolidation can become excessive comfort and a reluctance to move when movement is needed.

From the Moon, this axis is famously discussed in connection with financial planning and family security. The dispositors are Venus (Taurus) and Mars (Scorpio). A well-placed natal Venus tends to make the Taurus side of the axis genuinely productive; a Mars under duress can make the Ketu-in-Scorpio side feel like crises of shared finance and intimacy that resolve only through release rather than negotiation.

Rahu in Gemini, Ketu in Sagittarius

The Gemini-Sagittarius axis sets detail against principle, information against belief, and the immediate environment against the long horizon. Rahu in Gemini brings a proliferation of inputs: new technologies, languages, conversations, parallel projects, working identities, and an expanding social and intellectual network. Meanwhile, Ketu in Sagittarius dissolves the comfortable hold of inherited belief, the unquestioned authority of the teacher-figure, and the older sense of what one was supposed to pursue over the long term.

This axis may be intellectually generative and spiritually disorientating at the same time. Someone who entered the transit with a clear philosophical or religious framework may later find that it no longer carries the same weight. The framework need not have been refuted; its pull may simply fade as curiosity about specific, technical, and local matters expands. Mercury-ruled Gemini multiplies projects, while Jupiter-ruled Sagittarius supplies the older synthesising story that Ketu may now loosen.

The risk of this transit is overcommitment to information at the expense of meaning. Handled well, Rahu's proliferation is allowed to unfold while Ketu's release in Sagittarius rebuilds belief from the ground up instead of restating the old version. The dispositors are Mercury (Gemini) and Jupiter (Sagittarius). Where natal Jupiter is strong and well-aspected, the spiritual reconfiguration that Ketu produces tends to land as wisdom rather than disorientation; where Jupiter is weakened or afflicted, the same transit can feel like the slow loss of a centre.

Rahu in Cancer, Ketu in Capricorn

The Cancer-Capricorn axis carries one of the chart's weightiest polarities: home against career, mother against father, root against branch, and inner sanctuary against outer position. Rahu in Cancer draws attention back toward home, family, the maternal archetype, emotional security, food, and an inner sense of belonging. Meanwhile, Ketu in Capricorn loosens the grip of professional ambition, public role, structural achievement, and the discipline-driven self-image.

Many people describe this transit as a period when a long-running career that once defined them begins to feel less central. At the same time, a long-deferred concern with home, family, parents' health, or inner emotional life moves to the foreground.

This axis may bring grief when family responsibilities, a longstanding role, or a defining external structure changes. It should not, however, be read by itself as a prediction of a parent's death or any other specific loss. Ketu in Capricorn may correspond with completing a long chapter of structure-building, while the Cancer side draws attention toward a life less driven by external recognition and more nourished by relationship and care.

The dispositors are the Moon (Cancer) and Saturn (Capricorn). The condition of natal Moon shapes how Rahu-in-Cancer expresses - whether the inward pull lands as genuine renewal of the emotional life, or as moodiness, anxiety, and excessive identification with maternal patterns. The condition of natal Saturn shapes how Ketu-in-Capricorn releases - whether the structural dissolution is graceful, with a real handing-on of role, or abrupt and disorientating.

Rahu in Leo, Ketu in Aquarius

The Leo-Aquarius axis sets individual signature against collective belonging, the named self against the unnamed community, and the king against the council. Rahu in Leo pulls sharply toward recognition, the desire to be seen for something distinctive, creative work that carries a personal stamp, and the willingness to occupy centre stage. At the same time, Ketu in Aquarius dissolves older mass affiliations, ideological tribes, anonymous group identities, and the comfort of quietly contributing to something larger than oneself.

This axis is associated with public visibility and with changes in longstanding communities, depending on the rest of the chart. The Sun rules Leo, while Saturn rules Aquarius; some traditions also treat Rahu as a co-lord of Aquarius. For dispositor analysis here, the Sun's natal condition informs the Rahu-in-Leo side and Saturn's condition informs Ketu in Aquarius. A dignified Sun may support creative authority rather than ego-inflation, while a well-placed Saturn may help the Aquarian release unfold without a bitter departure from networks built over many years.

The classical risk during this axis is that Rahu's amplification of personal recognition combines with Ketu's release of group belonging, isolating a person at the very moment they become more visible. The corrective is to use the Leo current for genuine creative work and let the Aquarius dissolution release group identities that no longer serve, without aggressively burning bridges that might otherwise have remained standing.

Rahu in Virgo, Ketu in Pisces

The Virgo-Pisces axis sets method against surrender, work against rest, and the granular against the boundless. Rahu in Virgo pulls attention toward service, daily method, health discipline, detail, and the willingness to work hard for incremental improvement. At the same time, Ketu in Pisces dissolves older spiritual identities, escapist tendencies, dreaminess, the comforts of imagination, and longstanding surrender to a religious framework that had operated without much examination.

This axis is one of the most useful in the zodiac for building competence. Mercury-ruled Virgo grounds Rahu's amplification in measurable work, while Jupiter-ruled Pisces, under Ketu's influence, releases an older surrender that may have functioned as avoidance. Many people use this eighteen-month period to learn a skill, complete long-deferred professional training, or restructure their daily routine in a way that genuinely improves health and capacity.

The risk is the inverse: Virgo's analytic intensity, amplified by Rahu, can spill into anxiety, over-control, and a perfectionism that exhausts the body. As Ketu in Pisces releases the older spiritual centre, a person may be left without inner rest from the Virgoan striving. The corrective is to preserve genuine contemplative space through meditation, prayer, time in nature, or the practices carried by the Pisces side of the chart, even while the Virgo work moves forward. The dispositors are Mercury (Virgo) and Jupiter (Pisces), and the natal condition of both shapes how the axis expresses.

Eclipse Seasons: When Nodal Transits Intensify

The nodal axis is not only a transit line. It is also the geometrical condition under which eclipses occur. A solar eclipse can happen only when the New Moon falls close to a node; a lunar eclipse can happen only when the Full Moon falls close to a node. Because the nodes precess slowly, the eclipse seasons move with them. Across the eighteen months that the axis occupies one pair of signs, each eclipse falls near one end of the moving nodal line. This geometry explains why Jyotish discusses nodal transits and eclipses together. NASA's eclipse glossary gives the interval between eclipse seasons as about 173.3 days.

For the Vedic reader, this means that the eighteen-month transit usually comes with three eclipse-season "intensification windows," and occasionally a fourth window near an ingress boundary. These windows are when the karmic instruction of the axis lands with the most force. An eclipse near the Rahu end emphasises the Rahu side of the teaching - the house Rahu now occupies receives a sharp ingress of new energy, often arriving as event, opportunity, or sudden development. An eclipse near the Ketu end emphasises the Ketu side - the house Ketu occupies receives the dissolution more visibly, often arriving as release, ending, or the emergence of a quiet clarity that had been forming under the surface.

How to read an eclipse on the axis

To personalise an eclipse season, compare the eclipse degree with the natal chart. Jyotish readers generally give a close contact with the natal Sun, Moon, Lagna, or another key planet more weight than an eclipse in an otherwise quiet part of the chart. There is no single universal orb, so the degree contact must be weighed with the running dasha and the rest of the chart.

Some Indian observances and Jyotish practitioners counsel restraint during the eclipse itself, using the interval for meditation, mantra, and reflection. This is best understood as contemplative guidance rather than a deterministic rule. If emotions are heightened, allowing time before an irreversible decision can be a prudent response without treating the eclipse as inherently dangerous.

Eclipse sequences and their symmetry

Eclipses within a season usually occur about a fortnight apart. A season commonly contains two eclipses and can sometimes contain three, so the sequence may touch one node, then the other, and occasionally return to the first. Do not assume that the first eclipse always belongs to Rahu and the second to Ketu; identify the degree and node involved before interpreting either end of the axis.

Some people report that the interval between eclipses feels unusually intense, especially when the degrees contact sensitive natal points. Regular sleep, meals, and spiritual practice may help maintain perspective. Any delay in a major decision should rest on the person's actual circumstances, not on a blanket prohibition.

Why some natives feel eclipses heavily and others do not

Whether an eclipse season feels personally prominent depends partly on how closely its degree contacts the natal Sun, Moon, Lagna, or another key placement. The natal chart, running dasha, and condition of the relevant dispositors also matter, so the eclipse degree should not be used alone. Without a close natal contact, a person may register the season more as background atmosphere.

This is why the same astronomical event may feel pivotal for one person and barely noticeable for another. The degrees touched in the natal chart help show whether the season is likely to feel personal, but they remain one part of a wider reading.

Working With Rahu-Ketu Transits Practically

Knowing where the nodes sit in your chart is only the first step. The practical work is not to avoid the transit, but to respond thoughtfully to the instruction the axis appears to offer.

Move toward the Rahu house with discipline, not impulsivity

Rahu is amplification, but it is also confusion. The house Rahu now occupies in transit is where new energy is genuinely available: new opportunity, new fascination, new opening. It is also where perspective is easiest to lose. The classical counsel is to engage the Rahu house actively and with deliberate structure: written goals, regular review, mentorship, and the willingness to sleep on decisions before committing. Rahu supports ambition when it has a container; when it is unmoored, the same ambition scatters. A disciplined person can use the eighteen months to build something real in the Rahu house, while an undisciplined person may chase amplification in every direction and end the transit having moved a great deal without arriving anywhere in particular.

Let the Ketu house go, gracefully

A common mistake during a nodal transit is to fight Ketu's dissolution in the house it occupies. The instinct is understandable: Ketu releases structures a person has built and identified with, so the loss feels real. Yet that house often represents an area whose lesson has already run its course in this chapter of life, even if the person has not recognised it yet.

Fighting the release usually prolongs the discomfort. Cooperating with it may mean finishing a project, completing a role, releasing an affiliation, or allowing a relationship to reach its natural conclusion. That cooperation creates a cleaner ending and a quiet space from which to enter the next phase.

Use the eclipse seasons for inner work

An eighteen-month transit usually contains three eclipse seasons, or sometimes four when one falls close to an ingress boundary. Many practitioners treat these intervals as times for reflection rather than impulsive action, but this is contemplative guidance, not a universal prohibition on contracts or new ventures. Mantra repetition, scripture reading, sustained meditation, and time away from media saturation may help create the quiet needed for considered decisions.

Track the dispositors

The Rahu and Ketu transit does not operate in isolation. The dispositor of each - the rashi lord of whichever signs Rahu and Ketu currently occupy - is also moving through the chart at its own pace. The condition of those dispositors at any given moment shapes how the nodal axis expresses. When the dispositor is well-placed in transit, the axis tends to deliver its instruction with more grace. When the dispositor is itself under pressure, the axis tends to intensify whatever pressure was already in the chart. The experienced reader watches the dispositors as carefully as the nodes themselves.

Note the dasha context

A Rahu-Ketu transit may become more prominent during a running Rahu Mahadasha or Ketu Mahadasha because the dasha and transit repeat the same nodal emphasis. Rahu Mahadasha during a Rahu-in-the-10th transit, for example, may concentrate attention on professional life, but the result still depends on natal placement, the dasha lord, transit position, and the condition of the dispositors. Use Paramarsh to lay these layers together rather than reading any one of them alone.

Frequently Asked Questions

How long does one directed Rahu-Ketu sign-pair last?

Roughly eighteen months. The lunar nodes complete the full zodiac in about 18.6 years, and Rahu passes through all twelve signs while Ketu remains opposite. That gives each directed Rahu-Ketu sign-pair about a year and a half. The same sign axis is revisited roughly 9.3 years later with Rahu and Ketu reversed.

Why do Rahu and Ketu always sit opposite each other?

Because they are not bodies but the two points where the Moon's orbit crosses the ecliptic - one ascending, one descending. Those crossings are geometrically always 180 degrees apart, so Rahu and Ketu are always in opposite signs and opposite houses. The line between them forms a single axis through the chart, and that axis moves together during transit.

Should the nodal transit be read from the Lagna or from the Moon?

From both. The Lagna reading describes which areas of life are externally activated. The reading from the Janma Rashi describes how the inner field of mind and emotion is being reshaped. When the two readings agree on direction, the transit lands more heavily; when they disagree, the transit's effects feel split between outer events and inner shifts.

Why do eclipses cluster during a Rahu-Ketu transit?

Because eclipses can only occur near a node. While the nodes sit in a particular pair of signs, eclipse seasons recur roughly every six months, and each eclipse falls near one end of the same moving nodal line. These seasons act as intensification windows within the transit, when the karmic instruction of the axis comes through with the most force.

Is a Rahu-Ketu transit always difficult?

Not at all. The transit's difficulty depends on the houses activated, the condition of the sign lords, the natal placements, and the running dasha. Some Jyotish traditions regard Rahu's transit through the 3rd, 6th, 10th, or 11th from Lagna or Moon as comparatively constructive, but no house position should be judged without the rest of the chart.

Explore with Paramarsh

A Rahu-Ketu transit is a single instruction running through the whole chart at once: more in the house Rahu now occupies, less in the house Ketu now occupies. Across eighteen months, that instruction can shape a career, a marriage, or a turning of the inner life. The people who navigate it most clearly are those who can see exactly which two houses the current axis is activating, who the dispositors are, and whether their running dasha amplifies the transit or runs against it. Paramarsh lays all of these layers together from your birth data, with Swiss Ephemeris precision, so the next axis shift arrives in your reading rather than in your inbox.