Synastry Chart: Astrology Compatibility Explained

Synastry is the astrology of relationships. By comparing two birth charts, it shows where two people flow easily together, where they challenge each other and what they come together to learn.

Beyond Sun-sign compatibility

Sun-sign matches are only the beginning. Real compatibility lives in how your Moon, Venus, Mars and Ascendant interact with the other person’s planets. Two “incompatible” Sun signs can have a wonderful relationship when their other placements connect.

What a synastry chart shows

Sun and Moon contacts: deep understanding and a sense of home
Venus and Mars contacts: attraction and chemistry
Mercury contacts: how easily you talk and understand each other
Saturn contacts: commitment, lessons and staying power
The Nodes: karmic or destined connections

The composite chart

A composite chart blends two birth charts into one by finding the midpoints between each pair of planets. It describes the relationship itself as a third entity, with its own personality and purpose.

Frequently asked questions

What is the difference between synastry and composite charts?

Synastry compares two charts side by side to see how you affect each other. A composite chart merges them into one chart that describes the relationship.

Can I compare charts with friends and family?

Yes. Synastry works for any relationship. Soul Energy Insight lets you compare charts for romance, friendship and family.

Keep exploring

Birth ChartGet your free birth chart and learn how to read it: planets, signs, houses, aspects and your Big Three, explained in plain words..The Big ThreeWhat are your Big Three in astrology? Learn what your Sun, Moon and Rising signs mean and how they work together..Rising SignWhat does your rising sign mean? Learn what the Ascendant is, why it needs your birth time, and how each rising sign shows up..Moon SignWhat does your moon sign mean? Learn how the Moon in your birth chart shapes your emotions, needs and inner world..The 12 HousesWhat do the 12 houses in astrology mean? A simple guide to each house in your birth chart, from the 1st house of self to the 12th house of the subconscious..Solar ReturnWhat is a solar return chart? Learn how your birthday chart predicts the themes of your year ahead, and why your location on your birthday matters..

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Your Sun sign is only the beginning. Get your complete natal chart with your Ascendant, Moon, planets, houses and shadow readings, plus your Solar Return, Lunar Return and daily transits. In English, Spanish and Portuguese.

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