Compatibility is a dynamic, not a score.

What synastry compares

Synastry places the planets of two charts in relationship. It asks how one person's placements contact the other person's planets, houses, and angles.

Important relationship themes

The Moon can describe emotional rhythm, Mercury communication, Venus attraction and values, Mars desire and conflict, and Saturn commitment or pressure. The complete pattern matters more than one supposedly perfect aspect.

What compatibility cannot decide

No chart can determine consent, character, safety, or whether a relationship should continue. Astrology can help name dynamics, but relationships are lived through behavior, communication, boundaries, and choice.