Mahadashas of Navagraha
Mahadasha (Planetary period) is also called Vimshottari Dasha or Vimshottari Mahadasha in Vedic Astrology. Mahadasha is decided on the basis of birth nakshatra which is the nakshatra of placement of Moon in the birth chart of a native. If a native is born with Moon in Ashwini nakshatra, planetary period of Ketu is in effect at the time of his birth, since Ketu rules Ashwini. Likewise, if a native is born with Moon in Bharani, he’s born under Venus Mahadasha since Bharani is ruled by Venus.
Planetary periods repeat in fixed cyclic pattern and one cycle takes 120 years to complete. Here are the years covered by each Mahadasha in the order of its appearance.
Ketu Mahadasha runs for 7 years and it is followed by that of Venus.
Venus Mahadasha runs for 20 years and it is followed by that of Sun.
Sun Mahadasha runs for 6 years and it is followed by that of Moon.
Moon Mahadasha runs for 10 years and it is followed by that of Mars.
Mars Mahadasha runs for 7 years and it is followed by that of Rahu.
Rahu Mahadasha runs for 18 years and it is followed by that of Jupiter.
Jupiter Mahadasha runs for 16 years and it is followed by that of Saturn.
Saturn Mahadasha runs for 19 years and it is followed by that of Mercury.
Mercury Mahadasha runs for 17 years and it is followed by that of Ketu.
When Mahadasha of a planet is in effect, it gains extra strength. Hence the benefic or malefic results indicated by that planet in a horoscope may increase a lot. It should be noted that Mahadasha of a planet can’t change its functional nature in a horoscope and it gives results according to its functional nature in most cases.
It means if Mars forms Manglik Dosh in a horoscope, the worst results indicated by such Manglik Dosh may appear during Mars Mahadasha. Likewise, if Jupiter forms Hamsa Yoga in a horoscope, the best results indicated by such Hamsa Yoga may appear during Jupiter Mahadasha. In case a benefic or malefic yoga is formed by two benefic or malefic planets; strongest benefic or malefic results may appear during planetary periods of all such planets.
Among them, Mahadasha of the strongest planet may render the strongest benefic or malefic results. Taking an example, suppose Moon and Mars form Chandra Mangal Yoga in a horoscope. In this case, the native may witness strong benefic results during Mahadashas of Moon and Mars. If this yoga is formed in Capricorn, the strongest results may be observed during Mars Mahadasha, since Mars is stronger than Moon in Capricorn. On the other hand, if this yoga is formed in Taurus, the strongest results may be observed during Moon Mahadasha, since Moon is stronger than Mars in Taurus.
Likewise, if Rahu and Ketu form Kaal Sarp Yog in a horoscope, the native may suffer the most during Rahu Mahadasha and Ketu Mahadasha.