Dasha (pronounced "dah-sha") refers to the planetary period system used in Jyotish to time events in a person's life. The most widely used system is Vimshottari Dasha — a 120-year cycle divided among the nine Vedic planets, each ruling a defined period of time.
The sequence of Dashas is determined by the nakshatra (lunar mansion) your Moon occupied at birth. The nakshatra's ruling planet becomes your first Dasha planet, and the sequence unfolds from there in a fixed order.
The Vimshottari Dasha cycle assigns the following periods to each planet:
Each major period (Mahadasha) is subdivided into sub-periods (Antardasha) for each of the nine planets, and further into sub-sub-periods (Pratyantardasha). This creates an extraordinarily precise timing tool — the Antardasha of a planet within its own Mahadasha, for example, tends to be a period of intense focus on that planet's themes.
To understand what a Dasha means for you, look at three things: the ruling planet's natural significations, its house placement in your chart, and the houses it rules as Lagna Lord or through its sign rulerships. A Jupiter Mahadasha for a Sagittarius Lagna will feel very different from a Jupiter Mahadasha for a Gemini Lagna.
In practice, Jyotish astrologers use the Dasha system to time major life events — marriage, career changes, health challenges, spiritual openings. When a Dasha planet is also activated by a transit (Gochara) of Saturn or Jupiter, the timing becomes especially precise. The combination of Dasha and transit is one of Jyotish's most powerful predictive tools.
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