Synastry grid
Synastry lays two charts over each other: every planet of one against every planet of the other. Trines and sextiles are where you flow; squares and oppositions are where the relationship does its work. Real synastry runs on exact degrees, not sun signs.
How to read a synastry chart
Synastry is the art of laying two charts over each other and reading what happens where they touch. Every planet of one person is measured against every planet of the other, and the angles between them, the cross-aspects, are the wiring of the relationship. This runs on exact degrees, which is why two people with the same sun signs can feel nothing alike.
The harmony and friction counts are the quick read. Trines and sextiles are the easy currents, the places you flow without trying. Squares and oppositions are the friction, and friction is not doom: it is the ground where a relationship does its growing, the charge that keeps it alive. A pairing with only ease can go slack; a pairing with only friction exhausts. Most real ones carry both.
The tightest contacts, the ones with the smallest orb, matter most, and contacts between the Sun, Moon, Venus, and Mars carry the most weight of all: identity, feeling, love, and desire. The house overlays add another layer, showing where one person's planets fall in the other's life, which room of the chart they light up. That layer needs birth times; without them, the aspect grid still speaks.
A chart cannot tell you whether to love someone. It can tell you, honestly, where it will be easy and where it will ask something of you both, so you walk in with your eyes open.
Common questions
What is synastry?
Synastry lays two birth charts over each other and reads the angles between them: every planet of one against every planet of the other. It shows where two people flow together and where they do their work, in real degrees rather than sun-sign generalities.
Do we both need birth times?
Not for the core reading. Planet-to-planet aspects work without birth times. What needs a time is the house overlays, which show where one person's planets land in the other's life. If a time is missing, the grid still reads, just without that layer.
Which aspects matter most for compatibility?
The tightest ones, with the smallest orb, speak loudest. Trines and sextiles are ease and flow. Squares and oppositions are friction, the places a relationship does its growing. Contacts between the Sun, Moon, Venus, and Mars carry the most weight.
Is synastry the same as a compatibility score?
No. A single score flattens a relationship into a number. Synastry keeps the detail: which cords are easy, which are work, and what the two charts can build together that neither does alone. Friction is named honestly, never as a verdict.
How is this calculated?
Both charts are computed with the Swiss Ephemeris, the same engine professional astrologers use, in whole-sign houses.
The grid shows where. A reading shows how.
The Twelve Rooms writes human readings of what these exact contacts feel like from inside the relationship.
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