What is a Synastry Chart? &

Understanding the Art of Relationship Astrology

Astrology isn’t just about understanding ourselves—it can also provide deep insights into our connections with others. One of the most powerful tools for this is a synastry chart.

This type of chart helps uncover the dynamics between two people, showing how their individual energies interact. It is commonly used to explore romantic relationships, friendships, family bonds, and even business partnerships.

In this blog, we’ll dive into what a synastry chart is, what it can reveal, and why someone might want to get one. We’ll also break down the significance of Venus, Mars, and the Moon—the top three planetary influences in relationship astrology—and explore other important elements that can give a fuller picture of compatibility.

What is a Synastry Chart?

A synastry chart compares the birth charts of two individuals, overlaying them to show how their planetary placements connect.

Think of it as an astrological compatibility analysis—it highlights areas of harmony and potential challenges in a relationship.

By examining the aspects (angles) between two people’s planets, a synastry chart reveals:

Emotional connection and chemistry
Communication styles
Shared values, desires, and goals
Potential areas of conflict
Spiritual or karmic bonds

Why Get a Synastry Chart?

People get synastry readings for many reasons, particularly in romantic relationships, but it’s also helpful for:

Understanding emotional needs and compatibility
Improving communication and resolving conflicts
Gaining insights into challenges or recurring patterns
Exploring karmic connections or soul contracts
Assessing long-term potential

A synastry chart helps us approach relationships with greater awareness, compassion, and patience by revealing the unique dynamics at play between two people.

Key Elements in Synastry: Venus, Mars, and the Moon

While every planet plays a role in synastry, Venus, Mars, and the Moon are the most important when it comes to relationship dynamics.

These planets reveal how we love, express passion, and connect emotionally. Let’s explore what each one means in a synastry chart.

Venus: The Planet of Love and Values

In synastry, Venus represents love, attraction, and shared values. It shows how two people experience pleasure, romance, and affection.

Harmonious Venus aspects (like trines or sextiles) indicate natural attraction and shared tastes.
Challenging Venus aspects (like squares or oppositions) may point to different love languages or struggles with compromise.

Venus also reveals how each person expresses affection and whether they enjoy similar activities, aesthetics, and lifestyle preferences.

Mars: The Planet of Passion and Action

Mars governs desire, drive, and sexual chemistry. It shows how two people express their energy and passion, both in the relationship and individually.

In romantic relationships, Mars aspects are important for understanding the physical connection and the balance of energy between partners.

Positive Mars aspects suggest excitement, mutual motivation, and a healthy expression of desire.
Challenging Mars aspects can indicate conflict, frustration, or power struggles if not properly managed.

Mars also influences how partners approach challenges, whether they act as a team or struggle with competition and control.