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Best Synastry Aspects

Synastry aspects between natal charts to describe connections between two people. We look at this after first determining each persons relationship needs by studying their natal charts. It is essential to look at both charts first because you really do need to know what the other persons planets are plugging into. Person A’s planets will work like a permanent transit on person B’s planets when they are together, so its important to see just what this planet is triggering in the others chart. This is why reading synastry aspects in isolation can give a false impression.

For example, a couple may have the much hyped Venus conjunct Mars aspect in their synastry. Bingo! But hey, what if that Mars is aggravating an already seething Venus? What if B’s Venus is on the star Algol and conjunct Pluto? Ouch! All that blissful, romantic sexual compatibility could be blown away by extreme obsession, jealousy and even abuse.

This may actually be OK if both partners are rather Plutonian, they could even channel this energy into some kind of artistic/creative project. They would need an outlet that tackles facing the shadow and shedding like on the taboo which would make it cathartic and healing for them both. You need to keep in mind the basic personalities of each partner and if they have the creative opportunity to be able to transmute the energy into something positive.

When we look at synastry, we have to sift through all the aspects to get an overall picture. But first we do have to see if we are getting hits on the basics, which I think are important for the long term prospects of a couple. For me the basics are the Sun, Moon and Ascendant (the souls trinity) in aspect to the sexual planets (Venus and Mars) and the social planets of balance (Jupiter and Saturn).

If you are a karmic astrologer then the Vertex and the North Node are also important. It’s these basics that I use in the soulmate test that I do as part of my evaluation critera in synastry readings. To me they are the foundations of a successful relationship.

Best Aspects In Synastry

Sun/Sun Synastry Aspects

The Sun is the core of our being and identity so harmonious aspects between Sun’s in synastry will usually be easy going. You are both on the same page basically. You will not challenge each others egos. You are so at ease with the other person that you support each other by just being who you are. Even the opposition isn’t bad because there is a nice magnetic opposites attract feeling. You feel like you compliment each other, that together you are one. The square is the most difficult but it’s still a connection so it is compelling and dynamic. Queen Victoria and Prince Albert had this one, it’s more like “I have met my match”. Ego will take a beating, but they will whip each other into shape.

Moon/Moon Synastry Aspects

The Moon is our habits and our auto-pilot, how we instinctively react. The Moon is how we like to be nurtured and cuddled. So its preferable for the Moon’s to be harmonious in synastry if we want our relationship to feel like a comfy pair of slippers. Domestics are more likely to occur with hard aspects and even the conjunction because the sensitivity that comes with the Moon might just be rubbing a bit too close to the bone when the Moon’s are onto of each other. Either that or it could just be a little too symbiotic, merging into each other so that you don’t know where one ends and the other begins, like you are still in the womb.

Sun/Moon Synastry Aspects

This is the classic marriage indicator simply because it is what marriage is all about. The balance of day and night is what keeps the earth fertile. Ying and yang, male and female, partnership and balance. Fertility and growth are the fundamentals of a successful relationship. Even if you are not having children together you want your soul to thrive as well as to be materially comfortable. Harmonious aspects facilitate this fecundity. The opposition makes for a sexy polarity. The square will put obstacles in the way of growth, but the growth may end up being more durable because it will have forced you to build up more resilience. Again Victoria & Albert had this too.


  1. Ok so I have my Venus his sun direct opposition , also Mars moon direct opposition. My Venus is conjunction w Algol. There’s other things to. But wanted to mention that . Wondered what u think ?

  2. Marina, in your view, how dynamic would Person A’s Vertex conjunct Person B’s Descendant? Person B’s Vertex in this case also being 3-ish degrees off of Person A’s Sun.


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