What is a synastry chart?

A synastry chart compares two birth charts to analyze relationship compatibility. It examines how the planets in one chart aspect the planets in another.

Is synastry accurate?

Synastry shows relationship dynamics and potential challenges, but it doesn't predict outcomes. Free will and effort matter more than any chart.

What are the best synastry aspects?

Sun conjunct Moon, Venus conjunct Mars, and Moon trine Moon are considered highly favorable. But "best" depends on what you want in a relationship.

Can synastry predict if a relationship will last?

No. Synastry shows compatibility and challenges, but commitment, communication, and effort determine whether relationships last.

Do I need exact birth times for synastry?

Exact birth times make synastry more accurate, especially for Moon aspects and house overlays. Without birth times, you can still analyze Sun, Mercury, Venus, and Mars connections.

What if we have mostly challenging aspects?

Challenging aspects don't doom a relationship. They show where you'll need to work harder. Many successful couples have challenging synastry. --- *Curious how the planets affect your love life? [Try Scope free](https://tryscope.chat/onboarding) for personalized daily horoscopes that track Venus transits and relationship timing.*

Scope

Today's Horoscopes Current Sky

Horoscopes by Sign

Aries Taurus Gemini Cancer Leo Virgo Libra Scorpio Sagittarius Capricorn Aquarius Pisces

ToolsBirth Chart Calculator Rising Sign Calculator Moon Sign Calculator All Tools →

Learn Astrology About

Try Free

Love & Relationships·Published February 12, 2026·11 min read

Synastry Chart: The Complete Guide to Relationship Astrology

A synastry chart compares two birth charts to reveal relationship dynamics. Here's how to read synastry aspects and understand your compatibility with anyone.

Go beyond sun signs

Real compatibility is about your full birth charts - Moon, Venus, Mars, and more. Check your actual synastry for free.

Check Your Compatibility

You might also be interested in...

Love & Relationships

Birth Chart Compatibility: How to Compare Two Charts for Love and Relationships

Birth chart compatibility compares two full natal charts, not just sun signs. Here is how astrology compatibility really works, what to look for, and why synastry gives you a much clearer relationship picture.

Read the full article →

Love & Relationships

Love Astrology 2026: Best Dates for Relationships, Venus Retrograde, and Eclipses

The biggest love astrology dates of 2026, including Venus retrograde, eclipse season, and the best windows for new relationships, deeper commitment, and closure.

Read the full article →

Love & Relationships

Zodiac Compatibility: The Complete Guide to Astrological Matches

Which signs are most compatible? From best matches to challenging pairings, here's everything you need to know about zodiac compatibility in love and friendship.

Read the full article →