Various types of dashas have been described in Vedic astrology. But the Dasha system which is considered to be the most accurate and authentic, its name is Vimshottari Dasha system. Vimshottari Mahadasha is the simplest, accurate and popular dasha method. In this Dasha system, a specific time period has been assigned to all the 9 planets. The sum total of the years of the Mahadasha of all the nine planets is 120 years. According to this Dasha system, the maximum age of a human being in Kaliyuga is considered to be 120 years. In this Dasha system, Sun's Mahadasha is 6 years, Moon's Mahadasha 10 years, Mars's Mahadasha 7 years, Rahu's Mahadasha 18 years, Guru's Mahadasha 16 years, Saturn's Mahadasha 19 years, Mercury's Mahadasha 17 years, Ketu's Mahadasha 7 Varsha and the Mahadasha of Venus is of 20 years.