The traditional method of examining a relationship is to compare the aspects of planets in one horoscope with those in another. Additionally, the astrologer looks at the house positions of  each personís planets as they land in the other personís chart. This method is called Synastry and some astrologers swear by it. I swear at it.

Synastry fails at the bottom line. This method simply cannot tell you the most important thing about a relationship, and that is if it will work or not work. I have seen numerous cases where synastry broke down. Two of those were from my own life. One was my ex-wife.

The only thing synastry can do is indicate some points of attraction and repulsion, areas where the two people can work together or tend to clash, places where the two of you can get along easily or need to work things out.

Now this is important, but it wonít tell you if the two people will stay together or even get together. It also wonít tell you how the relationship affects each person individually.

Please keep that in mind as you read through the following lessons which list the inter-horoscope aspects.


So what will tell you if the relationship is go or no go? No one thing. There are several steps and you have to go through them all. No shortcuts.

(1) Before you even start to compare the horoscopes, you have to look at them separately. Check out their 7th houses, the partnership house. What kind of relationships are indicated? Letís say that one person has Mars there and it gets squares (90 degree angles) from Uranus and Saturn, and the other has a 7th house Saturn which is making a square Venus. Do you think that Any favorable aspects between those charts would make for a happy relationship? So step number one is to see what kind of relationships and partnerships each person tends to have individually.

(2) Now compare the interaspects between both horoscopes. Check them all. Beginners frequently jump to conclusions based on one or two indicators. Thatís a great way to reach the wrong conclusion. Check everything with one exception. In general, you can ignore aspects between the outer planets, Uranus, Neptune, and Pluto since they move so slowly. For instance, it can be very important if your Uranus aspects their Venus or your Pluto squares their Ascendant. But if your Plutoís are in conjunction, all it means is that you are born the same year.

(3) Next, check out the Composite chart and the Davison horoscope (also called the Relationship horoscope or the Davison composite).

a: The Composite chart is made by finding the Midpoints between similar things in the two horoscopes. For instance, if one person has the Sun at 10 degrees Aries and the other has it at 20 degrees Gemini, the composite Sun will be at 15 degrees Taurus. The same procedure is followed for all the planetary pairs (composite Moon, composite Mercury, etc.) and for the angles.

b: The Davison horoscope, named after itís discoverer, Ronald Davison, is an actual horoscope and not just a collection of midpoints. First you find the midpoints between the birth dates and times of the two people involved. Then you find the midpoint of their birth places. Form that, you calculate the horoscope in the usual manner.

Donít worry. Nowadays the computer does all the math. All you have to do is enter the birth data.

The two methods frequently give similar results. However, I tested both out on relationships for several clients. Every time the two methods gave different answers, the Davison chart won out. This was by no means a statistical sample and I do not offer this as ďproof.Ē The best procedure is to use both and see what results you come up with over a period of years.

This still doesnít tell us how each person is affected by the relationship, or if the relationship will go or not.

(4) The next step is to compare the charts of both people to the Davison chart. In other words, do synastry for each person with the relationship! This method almost always gives a better, more accurate picture of what is going on in a relationship than doing the synastry between the charts of the individuals. Why? I donít know. Perhaps the Davison chart has more of an effect if the two people actually have a relationship going. It could be that the whole is more than the sum of its parts here. A bunch of cells behave differently if they are swimming around separately in a flask than they do if they are linked together in an organism.

The organism has a life of its own, apart from the individual cells. Itís possible that something similar (not identical of course) could be going on with relationships. A relationship could somehow have traits of an individual entity.

(5) Now if this is the case, why not do two more Davison charts for each personís horoscope with the original Davison chart! That should show how the relationship affects each one individually. After all, many times the two people involved are affected differently. Perhaps one wants to continue the relationship while the other wants out. 

Or one benefits from the relationship while the other gets the short end of the stick. Iíve tried this in dozens of cases over the last few years and I believe this is the missing key to finding out whether or not a relationship works. I modestly call it a ďMarks Chart.Ē

To do a complete job, all of the above steps must be followed. The first step is very important because if someoneís birth chart shows relationship difficulties, they will be having problems no matter what the comparison says. 

Give a greater weight to the Davison and Marks Charts than to the synastry because these horoscopes get to the heart of the matter.

Be certain to have accurate birth times for both people or the analysis could be thrown way off. The horoscope angles (the Ascendant and Mid-Heaven) are extremely sensitive to birth time (a four minute difference will change them by one degree) and these are vital to getting accurate results. So be careful here. I frequently have people come to me with the birth date of someone they met, and they want to know if a relationship will work out. I tell them that the synastry can show some things, but without the other personís time of birth, no definitive answer is possible.

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