Vimshottari Dasha is a planetary period system spanning 120 years, divided among 9 planets. It predicts which planet's influence dominates during specific life periods. The sequence is: Ketu (7 yrs), Venus (20 yrs), Sun (6 yrs), Moon (10 yrs), Mars (7 yrs), Rahu (18 yrs), Jupiter (16 yrs), Saturn (19 yrs), Mercury (17 yrs).