It is important to check the similarity in nature of boy and girl before marriage. If their natures are not compatible with each other, it is very difficult to spend a whole life together. Similarity in nature in terms of their opinions, hobbies, choices, attitude etc.

As we know that marriage, timing of marriage, marital life, spouse is seen by 7th House means marriage house. Planets posited in this house play a very important role in native’s marriage.

Planets posited in a med in the marriage house, that means sun is in Libra rashi because libra rashi falls in 7th or marriage house in Aries ascendant. 

Sun is debilitated in Libra Rashi and in 7th house, so the results of Sun in this house are not positive. It creates ego issues between partners, isolation in relationship, separation of partners, irritable issues etc.

So the effect of the Sun here creates disturbances in the marital life arriage house influences marriage and the nature of spouse in a deep way.

We can understand this by taking few examples -

There are nine planets as per Vedic Astrology - Sun, Moon, Mars, Jupiter, mercury, Venus, Saturn, Rahu, Ketu.

So sometimes any one or more than one planet can be posited in a marriage house.

Example -

In Aries Ascendant , suppose Sun is posit of native. While matching kundli, the marriage house of both partners should be free from affliction. Now while continuing the example, if native’s spouse is having Saturn in the marriage house, then clashes between the couple will increase, as we know that Sun and Saturn are enemies of each other. Both create isolation from the relationship. Only the difference is that the Sun influence is having isolation due to ego and Saturn influence is having isolation due to sadness or coldness.