Looking for a detailed explanation of navamsa chart:

[sloth 0]

Hey, i am a begginer. I took an interest to my astrological chart due to my uncle having seen it and exclaimed many different things. I have seen both my rashi and navamsa chart, and although people tell me the navamsa chart holds stronger importance in marriage, i have read through many sources a planets strength in a rashi chart can be further reinforced with a strong navamsa. Exactly what is a navamsa, what is the distinct relationship between the navamsa and the raashi and why are they related. I have searched several pages and i still feel like there is a gap of unknown knowledge.

 

I would be very appreciative of anyone who would enlighten me.