Astrology
Synastry
Definition
The comparison of two people's natal charts to understand the dynamic between them — how each person's planets aspect the other's — and the astrological basis of relationship and compatibility readings.
Synastry is the astrological comparison of two people’s natal charts to read the dynamic between them. By overlaying the charts, an astrologer sees the aspects each person’s planets make to the other’s — where there’s ease, where there’s friction, and where there’s growth.
It’s the foundation of any serious compatibility reading, and it’s a world apart from a single “compatibility score.” Synastry treats a relationship as the meeting of two whole charts rather than two sun signs. It’s the technique behind deep relationship readings — including the way an AI mystic companion can read a connection as a full picture across many types of relationship, not just romance.