Synastry

Definition

Synastry is an astrology technique used to explore the dynamics between two people by comparing their natal charts. An astrologer places the charts together and examines contacts between one person’s planets, angles, and chart points and those of the other person. Unlike a composite chart, which creates one symbolic chart for a relationship, synastry keeps both individual charts distinct.

Astrological Meaning

Interpretation focuses on interchart aspects and house overlays. For example, one person’s Venus contacting another person’s Moon may suggest emotional warmth or compatible ways of expressing affection, while a Saturn–Mars contact can describe friction involving restraint, effort, or timing. Conjunctions, oppositions, trines, squares, and sextiles each indicate different patterns of exchange. Sign placement, aspect strength, and the condition of each planet in its original natal chart provide essential context; no single contact defines the relationship.

Why It Matters

Synastry can help people recognize areas of ease, attraction, misunderstanding, and growth within romantic, family, friendship, or professional relationships. It does not measure whether two people are destined to remain together. Instead, it offers a symbolic framework for discussing how their individual needs and habits may interact, supporting greater awareness, communication, and realistic expectations.

Related Encyclopedia Entries

• Natal Chart
• Astrology Techniques
• Predictive Astrology
• Composite Chart
• Aspects
• House Overlays