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Moon trine Mercury is a great aspect to have in synastry. It will give two people excellent communication, which will enhance any relationship.
Mercury is the primary planet that governs communication. This makes it one of the most important planets in synastry.
The Moon plays an important role in communication as well. As one of the Luminaries, its role is broad and plays a role in every aspect of our day-to-day lives. As the fastest moving planet, it also governs messages and messengers.
A trine is the most positive and harmonious aspect in synastry. It shows areas in which two people have an easy time getting along with each other.
Moon Trine Mercury in Synastry
Moon trine Mercury will create excellent communication between two people. They will understand each other on a deep intuitive level.
This aspect is powerful enough that, by itself, it will indicate a high degree of compatibility. It can ameliorate other aspects, even very difficult ones.
While chemistry and passion can bring two people together, it is communication that will keep them together over time. These two will be able to talk through whatever problem they may have between them.
As with most aspects, there are several sign combinations that will change its meaning somewhat. Some of these sign combinations can make it even more beneficial. Others will weaken it.
With the Moon and Mercury, all of the special sign combinations fall in either Earth Signs or Water Signs. It will act normally in Fire Signs (Aries, Leo, and Sagittarius) and in Air Signs (Gemini, Libra, and Aquarius)
Earth Signs (Taurus, Virgo, and Capricorn)
The best combination of this aspect in Earth Signs is Moon in Virgo and Mercury in Taurus. The Moon is exalted in Taurus, and Mercury rules and is exalted in Virgo. This will confer a great deal of compatibility between the two no matter what else is going on between the two charts.
This aspect becomes a bit more complicated if Mercury is in Capricorn. This will reduce the positive benefits of Moon trine Mercury because Capricorn is not very receptive to the Moon.
The person whose Mercury is involved will have a harder time listening to the other than would ordinarily be the case with this aspect. If the other person’s Moon is in Virgo, they will have an easier time picking up the slack and keeping the relationship together.
If the other person’s Moon is in Taurus, they may not be willing to compensate.
Water Signs (Cancer, Scorpio, and Pisces)
As a general rule, this aspect is weakened in Water Signs. This is because there is no combination that will not involve either a planet in a weakened condition or one that is less receptive to the other.
The situation is slightly improved if either person has Mercury in Cancer. This person will be quite motivated to keep the relationship together and will take the initiative to talk through any problems.
Pisces is hostile to Mercury, which means that if either person has the Moon in Pisces, they will tend to reject the other person when they are trying to communicate.
The worst combination of this aspect is the Moon in Pisces and Mercury in Scorpio. It will still be positive, but much less positive than it would otherwise be.
House Position
In addition to considering special sign combinations, it is also important to consider the houses that this aspect impacts in each person’s chart.
See:
Moon in Houses Synastry Meanings: 1st through 12th House
Mercury in Houses Synastry Meanings: 1st through 12th House
Man’s Moon Trine Woman’s Mercury Relationship
Moon trine Mercury is a great aspect to have in a romantic relationship, especially one that has long-term potential.
From early on in the relationship, the two will feel like they can talk to each other about anything. As the relationship progresses, they will find it easy to talk through anything that may come up.
This aspect is not one that will produce physical chemistry, however. This will have to come from other synastry aspects between them.
Instead it will make the two feel like best friends.
With this particular combination, gender roles become much less important. If they marry or live together, it will be easy for them to divide tasks and chores in a way that suits both of them.
Woman’s Moon Trine Man’s Mercury Relationship
This combination is quite similar to that in which the genders are reversed as described above. The two will find it easy to talk to each other and they will be able to work through almost any difficulty.
With a woman’s Moon trine a man’s Mercury, however, the two are more likely to fall into traditional gender roles with their relationship.
The relationship will bring out her more nurturing side and his more analytic side. This will happen naturally, without any sense of resentment or competition.
Moon Trine Mercury in Friendship
Moon trine Mercury is a great aspect to have between friends. They will be able to talk to each other about anything, and it is quite likely that the two will become “best friends.”
They will be able to talk for hours, but they will also be comfortable sitting in silence together.
One of the many benefits of this aspect in a friendship is that the two will be able to be sounding boards for each other. They will also give each other excellent advice.
How to Tell if the Moon is Trine Mercury in Synastry
Signs that are trine belong to the same element, as you can see in the graphic below.
This aspect will be in effect to a certain extent if the planets are in the correct signs.
The closer it is to exact, the better it will be. The orb, or allowable margin of error, for aspects between the Moon and Mercury is nine degrees.
The planets can be within nine degrees of a perfect trine from the wrong signs. This is known as a cross-sign aspect.
In the case of a cross-sign trine, the planets will be in signs that are not compatible with each other. The Moon trine Mercury is a strong enough positive aspect that it will still be in effect across signs.
In this case, the two will have a lot of differences, but they will still be able to talk through them.
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Conclusion
The Moon trine Mercury is a powerful positive aspect that will confer compatibility on its own.
It makes communication between two people easy and pleasant. Even if there are other aspects between them that are difficult, they will be able to talk through whatever problems they may have.