This article is in Russian — the editorial team currently writes them in Russian only.
Synastry: What It Is and How to Read Compatibility Through Birth Charts
Synastry in simple terms
Synastry is a way of comparing two birth charts to see how one person’s planets connect with the other’s. Put simply, you place one chart beside the other and look for direct contacts—these are the signals of mutual understanding, conflict, or fated ties. It is important not to confuse synastry with a composite chart: the former reveals the dynamics of interaction, while the latter is the couple’s “shared chart.”
This is not fortune-telling, but a technical analysis of planetary placements and aspects. When people ask, “What is synastry?”, they may expect something mystical, yet in practice it is a set of principles: which aspects act as bridges and which become obstacles.
Which synastry aspects indicate attraction or friction
The classics: harmonious Sun–Venus aspects bring attraction and a warm aesthetic connection; Moon–Venus aspects bring emotional affection. Trines and sextiles usually carry ease and support, while squares and oppositions point to tension and growth. Mars–Saturn often suggests sexual attraction accompanied by trials, while Saturn in challenging aspects can create a sense of duty or restriction.
There are also distinctive markers: conjunctions often create powerful attraction or a sense of looming intensity, especially when the Ascendant or Moon is involved. Nodal and karmic aspects (the lunar nodes, Pluto) signal deep transformation and a feeling of “fate” in the relationship.
House overlays and personal planetary connections: why they matter
When one person’s planets fall into the other person’s houses, they show which area of life the partner activates: their Mars in the other’s 4th house may stir passions at home, while Venus in the 10th can bring public support and enhance social standing. A partner’s planet conjunct the Ascendant is always an important marker of first impressions and of the image that unfolds within the relationship.
Do not overlook house rulers: the ruler of your 7th house in aspect to your partner’s personal planets is especially significant for long-term relationships. House analysis makes the picture more specific, from everyday life to career dynamics.
How AI helps interpret synastry—and what to keep in mind
AI speeds up calculations and clearly highlights key aspects and orbs, but interpretation remains a human task: you need to consider planetary strength, retrogrades, aspect exactness, and the house where an aspect manifests. A good AI synastry reading will provide a list of priorities: which contacts matter most, where effort is needed, and what resources the couple has.
In conclusion, synastry is a tool, not a verdict. It reveals strengths and vulnerabilities and offers a map for dialogue and growth. You can approach it rigidly and dryly, or as a conversation about where you complement one another and where you will need to find common ground.