Planets in houses · Trikona
Rahu in the 9th house
North node · Dharma Bhava
Rahu is the karaka (significator) of ambition, foreign links, technology and desire. The 9th house, called Dharma Bhava, shows luck, dharma, father and higher learning. When Rahu sits here, these matters take on its colour.
In the 9th house a malefic can test faith or relations with father and teachers, and makes one follow one's own path.
The 9th house is a trikona (trine), one of the houses of fortune, which improves whatever graha sits here.
Rahu is a shadow graha and gives the results of the sign lord and conjunct grahas; it is considered strong in Vrishabha.
Results are weaker if Rahu is debilitated in Vrishchika, combust, or afflicted by malefics.
In transit (gochar)
When Rahu transits the 9th house counted from your Moon sign, the period traditionally needs more care.
A single placement is never read alone: sign, aspects, conjunctions, dasha and the whole chart change the outcome.