The Moon in the Birth Chart: Rashi, Nakshatra, Dasha

The Moon stays in a sign for roughly two and a half days and in a nakshatra for roughly a day. The sign is the Chandra rashi people ask for. The nakshatra is the finer address: one of twenty-seven, each ruled by Ketu, Venus, Sun, Moon, Mars, Rahu, Jupiter, Saturn, or Mercury in that repeating order. The unused fraction of the birth nakshatra times its lord's full years is the opening mahadasha balance. Moon's own mahadasha, when the birth star is Rohini, Hasta, or Shravana, lasts up to ten years. A birth a few hours earlier can fall in the previous nakshatra and a different lord. That is the practical reason a rounded birth time still matters for the Moon, not only for the lagna.

The Moon is exalted in Vrishabha and debilitated in Vrishchika. Waxing and waning matter in classical reading: a Moon moving away from the Sun through Shukla paksha is considered to be gathering light, and a Krishna paksha Moon is spending it. The house the Moon occupies shows where the mind habitually lives. In the 10th the mood is public. In the 4th it is domestic. In the 8th it is interior and easily alarmed. Saturn or Rahu sharing the Moon's sign changes the tone without changing the nakshatra lord. None of this is a medical statement. It is the map of manas. The lagna lord remains the map of the body and the course of events.

Sade Sati is Saturn's transit through the 12th, 1st, and 2nd signs from the Moon, about seven and a half years. Jupiter's roughly one-year stay in a sign is also read from the Moon in ordinary gochar. Those transits do not move the natal dasha. A person can be in Venus mahadasha, twenty years, while Sade Sati passes, and both clocks are valid. Jyothish SI calculates the sidereal Moon with Lahiri ayanamsa after the city fixes the zone offset. Paid plans can add WhatsApp transit alerts on top of that natal Moon. The alert is only as good as the Moon sign in the birth chart.