Pillar article
When Jupiter Supports a Relationship
Jupiter is good for a relationship when its 5th, 7th, or 9th aspect falls on the 7th house, the 7th lord, or Venus. It is also the 7th lord itself for Mithuna lagna, where the 7th is Dhanu, and for Kanya lagna, where the 7th is Meena. In those two charts Jupiter's own dignity is the marriage lord's dignity. Exalted in Karka it is strong. Debilitated in Makara it is the karaka of counsel in its fall.

The aspect is the common gift
Every graha aspects the 7th house from itself. Jupiter also aspects the 5th and 9th. Jupiter in the 11th casts its 5th aspect on the 3rd, its 7th aspect on the 5th, and its 9th aspect on the 7th, so it still glances the marriage house. Jupiter in the 1st aspects the 5th, 7th, and 9th, a direct blessing on the spouse house. Jupiter in the 7th occupies it and aspects the 11th, 1st, and 3rd. Occupying the 7th is not the same as a gentle aspect. It enlarges the marriage, for better or worse, especially if Rahu joins it. The clean 'good for relationship' statement is the aspect from outside, or Jupiter as a dignified 7th lord, not Guru Chandal sitting in the 7th.
When Jupiter rules the marriage
Mithuna: Jupiter rules the 7th and the 10th, so the marriage lord is also the career lord. A strong Jupiter ties spouse and work. A fallen Jupiter in Makara, which is the 8th for Mithuna, puts the marriage lord in the rupture house and in debilitation. Kanya: Jupiter rules the 4th and the 7th, home and spouse. Jupiter in Dhanu or Meena is then in own sign. Jupiter in Karka is exalted, and for Kanya, Karka is the 11th, so the marriage lord is exalted in the gains house. These are specific. For other lagnas Jupiter is only the aspecting friend, or the 5th lord, or a dusthana lord. For Simha, Jupiter rules the 5th and the 8th. Its aspect on the 7th still helps, and its lordship carries rupture. Say both.
Dasha and the limit
Jupiter's 16 years, or Jupiter's antardasha in the 7th lord's period, is when this help is a season rather than a natal glance. A glance does not erase a 7th lord in the 8th. It moderates. Venus remains the karaka. A good Jupiter and a fallen Venus is a wise counsel around a tired affection. Read both. No Thursday rite creates an aspect the chart does not have.
Frequently asked questions
Does Jupiter in the 7th always bless marriage?
It enlarges the house. With dignity and without Rahu, that enlargement is often protective. With Rahu, it is Guru Chandal in the spouse house. Do not skip the companion.
For whom is Jupiter the 7th lord?
Mithuna lagna, 7th in Dhanu, and Kanya lagna, 7th in Meena. Elsewhere Jupiter helps by aspect or by ruling the 5th or 9th, and sometimes it also rules a dusthana.
Is exaltation required?
No. An aspect from a merely well-placed Jupiter still counts. Exaltation in Karka is the strongest dignity. Fall in Makara is the dignity you must mention if it is there.
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D1, D9, D10, dashas, yogas, and transits, the same calculations referenced in this article.
