# Composite chart

> A composite chart merges two people's charts into one that stands for the relationship. How it is built and how astrologers read it.

- Page: https://novaoracles.com/glossary/composite
- Language: en

A composite chart is a single chart built from the midpoints between two people's charts, the halfway degree between one person's Sun and the other's, and so on for every planet and point. It is read as the relationship itself, a third entity with its own signature, rather than as either partner. Where synastry compares two charts, the composite describes the bond they form together, its purpose, its ease and its friction.

A composite chart is a clever trick. It takes two people's charts and blends them into a single new chart that stands for the relationship itself, as if the bond between them were a third party with a birth chart of its own.

## Midpoints: how a composite chart is built

The usual method works from midpoints. You take the halfway point between the two people's Suns and call it the composite Sun, the midpoint of their two Moons the composite Moon, and so on through every planet and point. String those midpoints together and you have one chart that belongs to neither person but to the pair. It is a mathematical construct, not a real moment in the sky, since no one was born when the composite says. A related method, the Davison chart, instead uses the midpoint in time and place, which does produce a real chart for an actual instant.

## Reading the composite Sun, Moon and Venus

Tradition reads the composite as the character of the relationship. The composite Sun is taken as its core purpose and identity, the composite Moon as its emotional tone, composite Venus as how it shows affection, and the [house](https://novaoracles.com/glossary/house) placements as where the relationship pours its energy. A reader treats the composite much like a natal chart, except the subject is the connection rather than a person.

## Aries 10° and Gemini 10° meet in Taurus

Say one person's Sun sits at 10 degrees of Aries and the other's at 10 degrees of Gemini. Their midpoint lands at 10 degrees of Taurus, so the composite Sun is Taurus even though neither of them is. A reader might describe a relationship with a steady, sensual, security-seeking core, a bond that wants to build something solid no matter how fiery or airy the two people are on their own.

## Composite, synastry and the Davison chart

A composite is not [synastry](https://novaoracles.com/glossary/synastry); synastry compares two charts, while a composite fuses them into one. It is also not the same as a Davison chart, which is built from a midpoint in time and space rather than a midpoint of positions. And the composite is not a real birth moment, so it has no true birth time of its own to lean on. That is part of why many astrologers read a composite next to the couple's synastry rather than on its own.

## Where a composite sits beside synastry

The NovaOracles [compatibility tool](https://novaoracles.com/tools/compatibility) works with two charts at once, the [compatibility guide](https://novaoracles.com/guides/compatibility) sets composite beside synastry, and [compatibility and synastry explained](https://novaoracles.com/blog/compatibility-and-synastry-explained) covers both.

## FAQ

### What is a composite chart?

A single chart built from the midpoints between two people's planets and points. It represents the relationship itself, read as if the bond had a chart of its own.

### What is the difference between a composite and synastry?

Synastry compares two separate charts and their contacts. A composite fuses them into one chart, so it describes the relationship as a whole rather than how each person affects the other.

### What does the composite Sun mean?

It is read as the core identity and purpose of the relationship, the thing the bond is fundamentally about, regardless of either person's own Sun sign.