Synastry basics: how two charts speak to each other

Synastry is the comparison of two natal charts. It shows what happens when one person's planets touch another person's planets, houses, and sensitive points.

This is not a compatibility score. Two people can have easy synastry and still avoid the work of relationship. Two people can have tense synastry and build something durable if they learn the language of the contact.

Personal planets

The Sun, Moon, Mercury, Venus, and Mars are especially important because they describe everyday experience: identity, emotional safety, conversation, affection, desire, irritation, and initiative.

Moon contacts show how people feel around each other at home and in vulnerable moments. Mercury contacts show whether conversation clarifies or confuses. Venus and Mars show attraction, taste, pleasure, and conflict style.

Saturn

Saturn brings seriousness. It can stabilize a bond, create commitment, and make people take each other seriously. It can also feel cold, critical, or heavy if the relationship has no warmth elsewhere.

Do not read Saturn as only "bad." Read what it asks from the couple: responsibility, patience, boundaries, maturity, or a more honest structure.

Houses

When someone's planets fall into your houses, they wake up those life areas. A person's Venus in your fourth house may feel intimate and familiar. Their Mars in your tenth house may energize your career or create pressure around public image.

Synastry is best read as a conversation between two charts. It asks not "are we compatible?" but "what do we activate in each other?"