Synastry Chart

A synastry chart compares two birth charts by overlaying them to see how the planets and points interact between two people. It reveals the dynamics, attractions, challenges, and compatibility patterns in relationships by analyzing the aspects (angles) formed between each person's planetary placements. This ancient astrological technique helps understand relationship chemistry and potential.

Synastry compares two individual charts point by point, showing how each person's planets interact with the other's. A composite chart creates a single chart representing the relationship itself as a separate entity. Synastry reveals individual dynamics and attractions, while composite shows the relationship's overall theme and purpose. Both provide valuable but different insights into partnerships.

Focus on Sun-Moon connections (emotional compatibility), Venus-Mars aspects (romantic and sexual attraction), Moon-Moon aspects (emotional understanding), and Sun-Venus contacts (affection and appreciation). Also important are aspects to the Ascendant (initial attraction), Mercury contacts (communication compatibility), and any conjunctions between personal planets, which create strong connections and mutual understanding.

While you can do basic synastry with just birth dates, exact birth times are crucial for complete accuracy. Birth times determine the Ascendant, Midheaven, and house placements, which affect attraction, life goals compatibility, and how planets manifest in each other's lives. Without exact times, you'll miss important dynamics involving the angles and house overlays.

Challenging aspects (squares and oppositions) don't doom a relationship - they indicate areas needing awareness, growth, and compromise. These aspects often create initial attraction through tension and excitement, but require conscious work to transform into strengths. Many successful relationships have challenging synastry aspects that, when understood and worked with, create passion and mutual growth.

Synastry reveals potentials, dynamics, and natural compatibility patterns rather than predicting outcomes. A chart with many harmonious aspects suggests easier compatibility, while challenging aspects indicate areas requiring more effort. However, relationship success depends on maturity, commitment, timing, and how consciously both people work with their astrological dynamics.

House overlays show where one person's planets fall in the other's chart houses, indicating which life areas are activated by the relationship. For example, your Venus in their 7th house suggests you naturally embody their relationship ideals, while their Mars in your 5th house might bring excitement to your creative and romantic expression. Overlays show how you influence each other's life themes.

Sun signs provide general compatibility themes, but detailed synastry aspects are far more revealing. Two people with traditionally incompatible Sun signs might have beautiful Venus-Mars connections, harmonious Moon aspects, or supportive Mercury contacts that create wonderful relationship dynamics. Focus on the specific planetary interactions rather than just Sun sign generalizations for accurate relationship analysis.

Age gaps can create interesting generational planet interactions in synastry. Outer planets (Jupiter through Pluto) move slowly, so partners with age differences might have one person's personal planets aspecting the other's generational planets, creating mentor-student, wisdom-sharing, or transformational dynamics. These relationships often involve significant mutual learning and growth themes.

Most synastry charts contain both harmonious and challenging aspects, creating complex relationship dynamics. Focus on the overall pattern: strong Venus-Mars attraction with challenging Mercury aspects might indicate physical chemistry with communication hurdles. Look for aspects that repeat themes - multiple emotional connections (Moon, Venus, Cancer/4th house) suggest deep caring despite other challenges.

Absolutely! Synastry reveals dynamics in all relationships - friendships, family, business partnerships, and mentor relationships. Different planetary combinations highlight different relationship themes: strong Mercury contacts for intellectual compatibility, Jupiter aspects for mutual growth and adventure, or Saturn connections for stability and long-term commitment in any relationship context.

Our synastry calculator uses VSOP87 planetary theory combined with Jean Meeus's "Astronomical Algorithms" for precise planetary positions. The mathematical accuracy matches professional astrological software when you provide accurate birth data. However, interpretation depth varies - our system focuses on major aspects and overlays that create the most significant relationship dynamics and compatibility insights.