Beyond the natal chart of an individual, astrology offers powerful techniques for understanding relationships. This branch, called relationship astrology, primarily uses two methods: Synastry and the Composite Chart. We'll start with Synastry.

Synastry is the art of chart comparison. It involves taking two individual natal charts and overlaying them to see how they interact. This reveals the chemistry, points of harmony, and areas of friction between two people.

In synastry, we look at the aspects—the geometric angles—that one person's planets make to the other's. These inter-chart aspects are the heart of synastry, describing the specific energetic exchanges between the two individuals.

Certain planetary pairings are especially significant in relationship astrology. For example, harmonious aspects between one person's Sun and the other's Moon suggest a fundamental compatibility. It indicates that the core identity of one person supports the emotional needs of the other.