synastry-chart-guide

Synastry Chart: How to Read Relationship Compatibility in Astrology

A synastry chart is not a compatibility score. It is a map of how two people’s planetary energies interact - where they flow easily, where they create friction, and where they push each other to grow. Astrologers have used synastry (from the Greek “syn,” meaning together, and “astron,” meaning star) for centuries to examine why some relationships feel like coming home and others feel like running into a wall. The roots of synastry analysis trace to the Hellenistic tradition - second-century astrologers like Ptolemy were already documenting how planetary angles between two charts revealed relationship dynamics....

February 19, 2026 · 12 min · Sidera