Rahu and Ketu are the lunar nodes: the two points where the Moon's path crosses the Sun's path. They are not physical planets. They have no disc you can photograph. They are always exactly opposite each other, so they form an axis through the chart - one house of hunger, one house of release - and they move together. Almost every panic about "the nodes" forgets that second sentence.
What they tend to do
Rahu inflates. It wants more of whichever house it occupies: more status in the 10th, more foreignness in the 12th, more unconventional partnership in the 7th. It is the graha of the new, the imported, the shortcut, and the obsession. In dignity (for example in Taurus, where many classics exalt it) it can build extraordinary worldly results. Out of control it is the rumour, the addiction, the plan that never lands.
Ketu cuts. It occupies the opposite house and describes what the person is done with, or what they know without being taught. In the 9th it can look like instinctive faith or a quarrel with teachers; in the 4th, a restless home. Ketu is not "spiritual" as a compliment. It is the planet of subtraction. Whether that subtraction feels like peace or like loss depends on the rest of the chart and on the dasha.
Because they are an axis, you never read one. A Rahu in the 10th is also a Ketu in the 4th: public hunger with a private vacancy, or a career that grew because home was never quite enough. Flip it and you get a different life with the same geometry.
Tap a house to place Rahu. Ketu sits opposite, always.
10th / 4th - career versus home
Rahu in house 10. Ketu in house 4. Always 180° apart.
Rahu in the 10th wants a name. Ketu in the 4th is the private vacancy.
A drawing of the nodal axis, not a reading of your chart. The Kaal Sarp toggle fills the houses from Rahu toward Ketu against the signs (clockwise from Rahu on this diamond). The empty half is Ketu toward Rahu. Check a real chart on the Kaal Sarp calculator.
Kaal Sarp is a special case, not the default
Kaal Sarp Dosha is the pattern in which the other seven grahas sit from Rahu toward Ketu against the order of the signs (Rahu as the mouth, always retrograde; Ketu as the tail). On a North Indian diamond that arc runs clockwise from Rahu. The other half, Ketu toward Rahu, is the reverse - some texts call that Kaal Amrit, not Kaal Sarp. That is a specific count, and the Kaal Sarp checker will tell you if it is full, partial or absent. Most charts are not Kaal Sarp charts. Having Rahu in a house is not Kaal Sarp. Having a Rahu Mahadasha is not Kaal Sarp. Treating every nodal contact as that dosha is how fear gets sold.
Even when the dosha is present, it is one configuration among many. Plenty of public, functioning lives have it. A strong Lagna lord, a supporting dasha and ordinary effort still decide more than the axis alone. The guide on Kaal Sarp is there for the real pattern. This page is here so the nodes themselves are not swallowed by it.
Eclipses, dasha, and Gulika
Eclipses happen when a New or Full Moon occurs near the nodes. They colour a short window. They are not a personality type. A Rahu or Ketu Mahadasha lasts years and should be read from the houses the nodes occupy and the planets they conjunct - the same way any other dasha is read - not from folklore about "Rahu people".
Gulika (Maandi) is a different shadow point, calculated from Saturn's portion of the day. It is not Rahu. If both show up in the same house, that house is heavy; they are still two calculations. See the Gulika in the houses guide and the Gulika calculator rather than blending the two into one "dark planet".
How to look at yours without theatrics
Cast the chart on the Kundli Maker. Note Rahu's house and Ketu's house. Name the topics: 10th/4th is career versus home, 7th/1st is other people versus self, 9th/3rd is belief versus self-effort, and so on. Then check whether a Kaal Sarp count actually applies. Then check which dasha is running. That is a complete nodal reading for a non-specialist. Anything that skips those steps and jumps to a curse is not classical Jyotish. It is marketing.

