When two people come together, they create something entirely new—a third entity that is greater than the sum of its parts. In astrology, this third entity is represented by the composite chart.

While synastry involves taking Person A's natal chart and overlaying it onto Person B's natal chart to see how they trigger one another, a composite chart mathematically merges the two charts to create a single, unified birth chart for the relationship itself. The composite chart reveals the core...

If synastry is 'how you interact with each other,' the composite chart is 'what you become together.' How a Composite Chart is Calculated The most common method for generating a composite chart is the Midpoint Method. The astrology software takes the exact degree of Person A's Sun and Person B's ...

It repeats this process for the Moon, Venus, Mars, the Ascendant, and every other point in the chart. The result is a fully functional natal chart with its own signs, houses, and aspects.

Because it relies on precise midpoints, an accurate composite chart requires the exact birth times, dates, and locations for both individuals. It is crucial to understand that the composite chart does not describe your internal feelings (that is synastry).

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