Synastry: 8 Types of Compatibility You Didn't Know About

Synastry is a branch of astrology that studies relationships between two people by comparing their natal charts. Unlike popular "zodiac sign compatibility" tests, synastry analyzes hundreds of factors: positions of all planets, aspects between charts, house interactions, and much more.

The word "synastry" comes from the Greek "syn" (together) and "astron" (star) - literally "comparing stars." This method was used in Ancient Egypt and Greece to evaluate marriage prospects.

The essence of the method is simple: two natal charts are taken and overlaid on each other. The astrologer analyzes how one person's planets interact with the other's. For example, if your Venus (love) forms a harmonious aspect with your partner's Mars (passion) - that is a sign of strong physical attraction.

But compatibility is not just about romance. Professional synastry analysis evaluates relationships across multiple parameters.

If you have ever read "Aries is perfectly compatible with Leo but incompatible with Cancer" - forget about it. Here is why such tests are useless:

1. Only the Sun Is Considered

Your "zodiac sign" is the position of the Sun. But a natal chart has 10+ planets, each of which affects relationships. An Aries person with Venus in Pisces will behave completely differently in love than an Aries with Venus in Aries.

2. Houses Are Ignored

Houses show in which life area energy manifests. A partner's planet falling in your 7th house (house of partnerships) may be more important than sun sign compatibility.

3. Aspects Are Not Considered

The main thing in synastry is the aspects between planets of two charts. Two "incompatible" by sign people may have amazing Venus-Jupiter or Moon-Sun aspects that make the relationship wonderful.

4. One Size Does Not Fit All

Each of the 12 signs contains 30 degrees. All Leos are different because the Sun can be at the beginning, middle, or end of the sign, and this changes aspects with other planets.

This is why on MystarX, compatibility is checked using full natal charts of both people, not just the sun sign alone.

Romantic compatibility is what most people mean when they ask "are we right for each other." It determines the level of attraction, infatuation, and romantic feelings.

Key Factors

• Venus-Mars aspects - classic indicator of romantic and physical attraction. Harmonious aspects (trine, sextile) create natural chemistry
• Sun-Moon aspects - show basic compatibility of masculine and feminine energy. Considered among the most important in synastry
• Venus-Venus aspects - matching love styles and values. Venus conjunction is one of the best indicators
• 5th house - partner's planets in your 5th house (house of romance) strengthen attraction

How It Manifests

High romantic compatibility gives a feeling of "butterflies in your stomach," mutual admiration, and desire to be together. However, without other types of compatibility (intellectual, family), romance alone may not be enough for long-term relationships.

Friendship compatibility shows how comfortable you are simply being around someone - without romantic context. It is the foundation of any strong relationship.

Key Factors

• Moon-Moon aspects - emotional comfort around each other
• Mercury-Mercury aspects - ease of communication and mutual understanding
• 11th house - partner's planets in your 11th house (house of friendship) create a natural friendly bond
• Jupiter aspects - mutual enrichment, support, and positive influence

Why It Matters

Research shows that the strongest marriages are those where partners are best friends. Romance may fade, but friendship remains. If you and your partner have low friendship compatibility, you may find things boring together once the initial infatuation passes.

Business compatibility shows how effectively you can work together, build a business, or collaborate on projects.

Key Factors

• Saturn aspects - structure, responsibility, and reliability in joint ventures
• 10th house - partner's planets in your 10th house (career) strengthen professional partnership
• Mars aspects - combined action energy and ability to achieve goals together
• 2nd and 8th houses - financial compatibility and ability to manage shared resources

Practical Application

Before starting a business with a partner, it is worth checking business compatibility. Some couples get along wonderfully in romance but cannot work together at all - and vice versa.

Family compatibility evaluates the potential for creating a strong family, managing a household together, and raising children.

Key Factors

• Moon-Saturn aspects - stability and security in the home environment
• 4th house - partner's planets in your 4th house (home, family) show potential for living together
• Moon-Venus aspects - tenderness, care, and comfort in the relationship
• 5th house (children) - aspects to the 5th house show compatibility in the area of having children

What Family Compatibility Tells You

High family compatibility means you share values about home and family, easily find compromises in daily life, and both strive to create a cozy home atmosphere.

Intellectual compatibility determines how interesting it is for you to communicate, exchange ideas, and learn from each other.

Key Factors

• Mercury-Mercury aspects - thinking style and ability to understand each other's logic
• Mercury-Jupiter aspects - intellectual enrichment and broadening horizons
• 3rd and 9th houses - shared interests in learning, travel, and philosophy
• Uranus aspects - unconventional thinking and ability to inspire each other

Why Check This

Even the most passionate relationships can become empty without intellectual connection. If you have nothing to talk about at dinner - that is a serious problem. Intellectual compatibility ensures depth of communication and mutual growth.

Sexual compatibility is about physical attraction, chemistry, and harmony in the intimate sphere. It differs from romantic compatibility - you can be romantically compatible but have different intimacy needs.

Key Factors

• Mars-Mars aspects - sexual energy and style of expressing passion
• Venus-Mars aspects - classic indicator of physical chemistry
• Pluto aspects - depth of attraction, passion, and transformative power of intimacy
• 8th house - partner's planets in your 8th house strengthen intimate connection
• Lilith - Black Moon shows hidden desires and magnetic attraction

Karmic compatibility is perhaps the most mysterious type. It shows whether there is a "karmic connection" between you - a feeling that you know someone from a past life.

Key Factors

• Lunar Nodes - North and South Nodes show karmic direction. Partner's planet aspects to your nodes indicate a karmic connection
• Saturn aspects to personal planets - Saturn in synastry often indicates karmic lessons
• Pluto aspects - deep transformation through the relationship
• 12th house - partner's planets in your 12th house (house of karma) create a feeling of deep, inexplicable connection

What It Means in Practice

High karmic compatibility often manifests as instant recognition upon first meeting, a feeling of deep connection from the first minutes, and a sense that this person entered your life for a reason.

Overall compatibility is an integral indicator that takes all seven previous types into account and gives a final assessment of the relationship potential.

How It Is Calculated

Overall compatibility is not a simple arithmetic average. It considers the weight of each type depending on the relationship context:

• For romantic relationships, greater weight is given to romantic, sexual, and family compatibility
• For friendship - friendship and intellectual
• For business - business and intellectual

What Is Considered a Good Result

• 80-100% - exceptional compatibility, rarely seen
• 60-80% - good compatibility, solid foundation for a relationship
• 40-60% - average compatibility, challenges possible but also growth
• 20-40% - low compatibility, significant effort required
• 0-20% - very low compatibility, serious challenges

Important to remember: low compatibility does not mean "impossible." It means more work on the relationship will be needed. Many couples with "imperfect" compatibility build wonderful families.

For a complete compatibility check, you need birth data for both people: date, time, and place of birth.

Step 1: Calculate Natal Charts

Create profiles for both people with accurate birth data.

Step 2: Run Synastry Analysis

On MystarX, simply select two profiles - the system will automatically calculate all 8 types of compatibility based on full natal charts.

Step 3: Study the Results

Each of the 8 parameters is rated from 0 to 100% with detailed description of key aspects and their meaning.

Step 4: Ask Your Astrologer

If any results surprise you or you want to understand them deeper, your personal MystarX astrologer can provide detailed interpretation considering the context of both charts.

All calculations are performed using Swiss Ephemeris with NASA JPL data - the same sources used by professional astrologers for serious synastry analysis.