What is "navamsa"

n. (context astrology English) A ninth part or division of a zodiac sign.

In Vedic astrology a constant reference is made to the Navamsa occupied by planets and the Lagna-point. Both, the Rasi-chart and the Navamsa-chart are deemed equally important and therefore, consulted together. Whereas the Rasi-chart provides overall information regarding the location of planets and sensitive-points such as the Lagna, the latter provides vital information regarding their active quality and strength. A planet may be well-placed in the natal-chart Rasi-wise but its full effects may not materialise if its situation in the navamsa-chart is not supportive.