Nine lords, one hundred twenty years
Vimshottari means 'one hundred and twenty': each graha holds a fixed mahadasha length, in the nakshatra-lord order of n17 — Ketu 7, Venus 20, Sun 6, Moon 10, Mars 7, Rahu 18, Jupiter 16, Saturn 19, Mercury 17. Total: 120. This table is the lesson's one memorization deliverable.
When any lord's chapter ends, the next in rotation takes over — Rahu's 18 years always hand the calendar to Jupiter's 16.
A ladder of ninety, a pocket of thirty
Hear the table as two groups. The heavy five climb a ladder of consecutive numbers: Jupiter 16, Mercury 17, Rahu 18, Saturn 19, Venus 20 — ninety years. The light four share the pocket: Sun 6, Ketu 7, Mars 7, Moon 10 — thirty years. Ladder of ninety, pocket of thirty: 120.
Blank on Saturn? Climb the ladder — 16, 17, 18 — Saturn is the 19th rung, one below Venus's 20.
The birth star names the first lord
The Moon's janma nakshatra (birth star) opens the sequence: whichever graha rules that star rules the first mahadasha. From there the rotation simply walks — and wraps, Mercury handing back to Ketu, forever. No other chart factor has any say in the order; only the entry point varies.
Moon in Ashlesha, a Mercury star: life opens in Mercury dasha, and when those 17 years end, the wheel wraps to Ketu.
The first chapter arrives partly spent
The Moon is always partway through its star, and the fraction already crossed is treated as spent. Balance at birth = (1 − traversed/13°20′) × the lord's full years. Only the FIRST mahadasha is prorated — every later chapter runs its complete length.
Moon 25% through Rohini, the Moon's own 10-year star: 0.75 × 10 = a 7.5-year Moon balance at birth.
From balance to biography by addition
Priya's Moon at 98.2° stands 36% through Pushya, Saturn's star: about 0.64 × 19 ≈ 12 years of Saturn remain. Then pure addition — Mercury to ~29, Ketu to ~36, Venus to ~56, Sun to ~62, Moon to ~72. Ages are approximate; the tradition computes to the day, and software does that. Your skill is the walk.
Notice the payoff: her life OPENED under the very Saturn her chart converts — the neecha-bhanga planet of n63. Struggle-first biographies are often just an opening Saturn balance doing its work.
The wheel outlives the rider
First: 120 years is the full wheel, not a life — most people live five to seven mahadashas, and WHICH ones depends entirely on the birth star; a Ketu-born life and a Jupiter-born life share almost no calendar. Second: strict computation uses the classical 360-day year — a software detail, named and shelved.
A Jupiter-born native spends ages 0 to 52 in Jupiter, Saturn, and Mercury — three chapters a Ketu-born native would not reach until age 68.
The meta rule
Table, star, walk
Nine lords, one hundred twenty years, one starting star. Learn the table, find the star, walk the wheel — every timing question in this course starts with these three moves. If you cannot recite the years, you cannot walk; if you cannot find the star, you cannot start.
Asked 'what dasha is she in at 40?' you never guess: birth star, balance, then addition until the sum passes 40.