Dharma meaning self righteousness, duty towards self, family, country, religion, and god, etc. the natural Dharma Karaka is Jupiter, so this house /bhava should be aspected by or posited by Jupiter for beneficial effects.
Dharma Bhava relates with Father, teacher, boss, fortune, religiousness, spirituality, God, higher studies & high knowledge, fortune in a foreign land, foreign trips, deeksha (joining a religious order), past life and the cause of birth, grandchildren, principles, dharma, intuition, compassion, sympathy, leadership, charity, thighs.
Effects of Dharma Bhava: BPHS
Grahs/Planets in 9th Bhava and the effects there from
If Sun occupies 9th bhava, the native will be endowed with wealth, children and friends, will be very interested in worshiping Gods and Brahmin's, will not be well-disposed towards his father and wife and be not calm.
If Moon occupies 9th bhava, the native will be devoted to divine and paternal assignments, will be endowed with happiness, wealth, intelligence and sons and will attract the fair sex.
If Mars occupies the 9th bhava, the native will not be skillful in acts, be odious, will kill living beings, be not virtuous, be very sinful and honored by the king.
If Mercury occupies 9th bhava,the native will be very affluent, scholarly, of good conduct/habits, be eloquent in speech, skillful of a great order and be virtuous.
If Jupiter occupies 9th bhava, the native will be attached to divine and paternal duties, be learned, fortunate, be a king's minister, or a leader and be chief.
If Venus occupies 9th bhava, the native will possess a spotless and broad physique, be endowed with wealth, charitable, wife, sexual pleasures and friendship and will honor Gods, guests and preceptors/elders.
If Saturn occupies 9th bhava, the native will be devoid of religious merits, will not have much wealth, be bereft of co-born, sons and happiness and will cause sorrow to others.
If Rahu occupies 9th bhava: Rahu intensifies the desire for exalted experience in divine rituals, often a native has a foreign guru, father does not benefit from this combination, might be associated with secretive activities involving international engagements, and to reach the truth the native destroys the natural barriers, Rahu in 9th house is not good for the native.
If Ketu occupies 9th bhava: Ketu in 9th effects the father, either father is never available or remains distracted, the Priests might appear deceptive, Native might suffer from psychological complexes with regard to religious truths and might not trust the religious authorities and might wander in his own imaginative sensitivities to reach the essence of truth, which is perceived by him/her as an external entity. Ketu in 9th effects the native in a negative way, with regards to his/her father, religion, teachings, etc. which might not be healthy for his/her.
So the bottom line for this bhava is this bhava should be connected with Jupiter in one way or other to derive or gain maximum benefits, other wise, things might not be as rosy as they are with Jupiter or Sun.
let me see my chart, I have Venus (8th in Rasi) in 9th bhava with Jupiter Aspecting it from the Ascendant, my Father was very dear to me and out of all siblings I was very dear to my father, but he passed away few months before his 64th birthday after suffering for 15 years, we had an excellent relationship, more as a friend then Father- Son, but I never crossed the line, I have intense religious beliefs, I have very high philanthropic ideals, I have very deep set principles and convictions, So Jupiter does confer all these properties.
With regards to eighth bhava, it is empty and is not Aspected by any planet, but the Rasi chart has Venus in 8th house, it is better to have an empty Du-Sthana (6th, 8th and 12th) then with an malefic.
It gets little confusing , when you say 8th house or 9th house. In Indian languages, Bhava means it is more Mental or psychological then physical presence, like a Graha/planet is present in 8th Sign in Rasi (Radix), but it gives effects of 9th house, because it is present in the 9th bhava, it is exactly like Planet in English is a physical body, but Graha in " Jyotish shastra", is more of a Mental, or psychological or metaphysical entity, or it is more like a powerful energy, which has the capacity to effect a living thing with its rays or aura, but when we explain this in English, it appears they are like table and chairs, which is not correct.
Aum NamaH Shivaya!
Sianala, Montreal, Feb 2008