What Your Synastry Chart Reading Covers

There is a specific feeling that comes with certain people. An ease that arrives before you have said anything significant. A friction that persists no matter how much goodwill exists on both sides. An attraction so immediate it almost feels like recognition rather than discovery. Synastry is the branch of astrology that maps exactly this — the quality of the connection between two specific people, written in the geometry of their charts.

A synastry reading overlays two natal charts and examines every significant contact between them. Your planets to their planets. The angles they make. Which parts of each person are lit up by the other, and which are challenged. The result is not a compatibility score — it is a precise, personalised description of what actually happens between you when you are in each other’s presence.

Your Nuastro synastry chart reading covers:

• The Sun-Moon contacts between both charts — the foundational axis of emotional attunement, often the signature of the deepest bonds
• Venus and Mars interaspects — where attraction, affection, and desire live between you, and whether they reinforce or frustrate each other
• Mercury contacts — how you communicate, whether your minds meet easily or talk past each other, and where misunderstandings are most likely to arise
• Saturn contacts — where one person’s Saturn aspects another’s personal planets, describing the relationship’s areas of commitment, restriction, and long-term weight
• Outer planet contacts — Uranus, Neptune, and Pluto aspects to personal planets, which tend to describe the more fated, destabilising, or transformative dimensions of the bond
• Lunar node contacts — connections to the north and south nodes that suggest karmic or past-life threads running through the relationship
• Angle contacts — any planet in one chart conjunct the Ascendant, Descendant, Midheaven, or IC of the other, which tend to be among the most personally felt connections in synastry
• A synthesis section that draws the major threads together — what the relationship’s overall dynamic is, where its natural strengths lie, and where both people are most likely to be challenged

Delivery is within 3 business days as a written PDF sent to your email. Reading length is typically 1,600–2,200 words depending on chart activity.

We offer this reading in both Nuastro real-sky and tropical formats, each for $29.99. We recommend the Nuastro real-sky reading — using IAU constellation boundaries for both charts means the interaspects are calculated from astronomically accurate positions, which can shift the sign and degree of personal planets enough to change which contacts are exact and which are wide. That said, if you both work primarily with your tropical charts, the tropical synastry reading draws on a rich and well-developed interpretive tradition and is a fully valid choice.

How to Order Your Synastry Chart Reading

Your reading costs $29.99. You will need the birth date, birth time, and birth location for both people. Birth time accuracy matters significantly for synastry — the Ascendant, Descendant, and house placements shift quickly, and angle contacts (which tend to be among the most powerful synastry connections) require a reliable birth time to identify.

If one or both birth times are unknown, let us know in your order notes. We can still produce a thorough reading focused on the planetary interaspects, which do not depend on birth time. We will note where the interpretation is approximate.

At checkout, choose between the Nuastro real-sky reading and the tropical reading, and add a brief note about the nature of the relationship — romantic, friendship, family, professional — so the reading is framed appropriately.

Order your Synastry Chart Reading — $29.99

You can run both individual charts for free at app.nuastro.com before ordering. Seeing your separate real-sky placements first often makes the synastry connections easier to recognise when the reading arrives.

What Is Synastry Astrology

Synastry is the practice of comparing two natal charts to understand the nature of the relationship between the two people they belong to. The word comes from the Greek syn (together) and astron (star) — literally, the stars together. The technique has roots in Hellenistic astrology and was practised in various forms across medieval Arabic, Persian, and European traditions, though the modern systematic approach to synastry developed significantly in the twentieth century through the work of astrologers including Robert Hand and Stephen Arroyo.

The core method is straightforward: two charts are overlaid, and the angles — called aspects — between planets in one chart and planets in the other are identified and interpreted. Your Venus at 14 degrees of a constellation conjunct their Mars at 16 degrees creates a very different dynamic to your Venus square their Saturn. Each contact describes something specific about how those two planetary energies interact across the space between two people.

What makes synastry powerful is its specificity. A generic compatibility reading based on Sun signs tells you something about the broad archetypal flavour of two people’s core identities. A full synastry reading tells you whether your particular Moon feels safe with their particular Saturn, whether your specific Mercury can actually hear their specific Mercury, and whether the attraction between your Venus and their Mars has a trine’s ease or a square’s intensity behind it. The difference between these is the difference between a generalisation and a portrait.

Real-Sky Synastry: What Changes When You Use Actual Sky Positions

In a standard tropical synastry reading, both charts are calculated using the tropical zodiac — the seasonal framework fixed to the solstices and equinoxes. The Nuastro synastry reading uses IAU constellation boundaries for both charts before comparing them. This means every planetary position in both charts reflects where that planet was actually visible in the sky at each person’s birth.

For synastry, this matters because interaspects are degree-sensitive. A conjunction is typically considered exact within 8 degrees and strongest within 3. If a tropical reading places your Venus at 2 degrees Scorpio and their Mars at 28 degrees Libra, those planets are 4 degrees apart — a close, powerful conjunction. But if the real-sky positions shift your Venus into late Virgo by IAU boundaries, those same planets may now be 12 degrees apart — a much wider, less activated contact. The chemistry described is genuinely different.

Real-sky synastry also surfaces Ophiuchus placements that tropical astrology misses entirely. When one person has a personal planet in Ophiuchus and the other’s chart makes a close contact to it, the Ophiuchus archetype — the healer, the threshold-crosser, the one who has been through something and carries that knowledge — becomes part of the relationship’s texture. This is a dimension of synastry that no tropical reading can access, and it is one Nuastro accounts for in full.

The Most Important Synastry Contacts

Not all synastry aspects carry the same weight. Here is a guide to the contacts that tend to matter most, and what each one describes in a real relationship.

Sun-Moon Contacts

The Sun-Moon conjunction or opposition across two charts is one of the most fundamental signatures of deep attunement in synastry. When one person’s Sun conjuncts another’s Moon, something basic fits — the Sun person’s sense of self feels natural and affirming to the Moon person’s emotional interior, and the Moon person’s emotional responsiveness tends to make the Sun person feel seen. This contact appears frequently in long-term partnerships of all kinds, and in close friendships that have lasted decades.

The opposition version of this contact (Sun opposite Moon) creates a similar sense of recognition but with more polarity — a feeling of completing each other that can also tip into projection if both people are not self-aware. Both versions of the contact are significant. Neither is inherently easier than the other.

Venus-Mars Interaspects

Venus-Mars contacts between two charts are the classic signature of romantic and sexual attraction in synastry — and with good reason. Venus describes what we find beautiful, what we move toward, what we want to give and receive in love. Mars describes what we desire, how we pursue, and what activates us physically and energetically. When these two planets make close contact across two charts — particularly conjunction, trine, or opposition — there is usually a noticeable charge.

The trine tends to be effortless and pleasurable. The conjunction is intense and immediate. The opposition creates a pull that is almost magnetic — drawn to what feels like the complement of oneself. The square produces the sharpest tension: desire that is complicated by friction, attraction alongside frustration. All four aspects describe real chemistry. Only the square consistently creates difficulty alongside it.

Saturn Contacts in Synastry

Saturn contacts in synastry are among the most consequential and the most misunderstood. When one person’s Saturn aspects another’s personal planet — particularly the Sun, Moon, Venus, or Mars — the Saturn person tends to feel older, more serious, or more stabilising in relation to the other. The personal planet person may feel simultaneously supported and constrained.

Astrologer Liz Greene wrote extensively about Saturn in synastry, observing that Saturn contacts are almost always present in long-term committed relationships — not because they are comfortable, but because they create the sense of seriousness and reality that makes a relationship feel like it matters. A relationship with no Saturn contacts at all can feel light and enjoyable but somehow lacking in gravity. Saturn gives weight. The question is whether both people can carry it without one feeling burdened.

Lunar Node Contacts

Contacts between one person’s planets and the other’s lunar nodes — the north node and south node — are among the most discussed synastry contacts in contemporary astrology, and for good reason. The south node contact in particular tends to produce an immediate, almost eerie sense of familiarity — as if you have known this person before. Whether you interpret that literally (past lives) or psychologically (deep archetypal resonance), the felt experience of it tends to be consistent across people who have it.

A planet conjunct the north node of the other person tends to feel like the node person is being pulled forward by the planet person — toward growth, toward unfamiliar territory, toward who they are becoming. A planet conjunct the south node feels like returning to something known — comforting, but sometimes difficult to move beyond. Both contacts suggest a relationship that carries more than ordinary significance.

Outer Planet Contacts

When one person’s Uranus, Neptune, or Pluto makes a close contact to another’s personal planet, the dynamic takes on a more destabilising, transformative quality. These are not comfortable contacts — but they tend to be among the most memorable.

Uranus to a personal planet creates an electric, unpredictable quality — the Uranus person disrupts and liberates the other, often awakening parts of them that had gone quiet. Neptune to a personal planet introduces idealism, projection, and sometimes confusion — a beautiful blurring of boundaries that can feel like soul recognition but requires both people to stay grounded. Pluto to a personal planet is perhaps the most intense of all: the Pluto person reaches deep into the other, touching something core, and the contact tends to feel inescapable regardless of whether the relationship is ultimately good for both people.

In your synastry reading, outer planet contacts are interpreted carefully and in context — not as warnings, but as honest descriptions of where the relationship’s most charged and potentially transformative territory lives.

Synastry for Friendships, Family, and Professional Relationships

Synastry is as illuminating for non-romantic relationships as it is for partnerships. Some of the most instructive synastry readings are between friends who have known each other for decades — the chart tends to explain, with uncomfortable precision, why the dynamic has always worked the way it has.

For parent-child relationships, synastry can reveal the archetypal roles each person plays in the other’s psychological development — where a parent’s Saturn falls on a child’s Moon, for instance, or where a child’s Pluto makes contact with a parent’s Sun. These are not judgements. They are descriptions of the developmental terrain the relationship creates.

For professional relationships — business partners, long-term colleagues, creative collaborators — the third house (communication), sixth house (work and daily structure), and tenth house (public reputation and ambition) contacts tend to be most relevant. A Mercury-Mercury trine between two business partners creates an almost effortless communicative ease. A Mars-Mars square creates productive tension that drives results, as long as both people understand that the friction is generative rather than personal.

When ordering for a non-romantic relationship, note the context in your order. The reading will be framed accordingly.

Synastry and the Composite Chart: Using Both Together

Synastry and the composite chart answer different questions, and the most complete relationship reading uses both. Synastry describes the interpersonal chemistry — what happens between you. The composite chart describes the relationship itself — what the bond is and what it is for.

A synastry reading might show intense Venus-Mars contacts and a beautiful Sun-Moon trine — real attraction and genuine emotional understanding. But the composite chart might show a twelfth house stellium — a relationship that is deeply meaningful but private, internal, and not built for sustained public life together. Both readings are true simultaneously. They are answering different questions.

If you want both, our combined synastry and composite reading covers them together. You can also order the composite chart reading separately if you have already had a synastry reading done elsewhere and want to add the composite layer.

Frequently Asked Questions

Can synastry tell me if we are meant to be together?

Synastry can tell you a great deal about the nature of what exists between you — the ease, the friction, the depth, the charge. What it cannot do is tell you whether a relationship is meant to last, because that depends on choices both people make over time. What the chart shows is the terrain. What you do with it is always yours to decide.

Our synastry has a lot of squares. Is that bad?

Not necessarily. Squares in synastry create friction and tension — but friction is also what generates heat, momentum, and growth. Many of the most dynamic and lasting relationships have significant square contacts. The question is not whether friction exists but whether both people are self-aware enough to work with it rather than against each other. A chart full of nothing but trines and sextiles can produce a pleasant but underpowered bond. Most meaningful relationships have both.

What if I only have one person’s birth time?

We can work with what you have. The person with a known birth time will have full house and angle placements interpreted. For the person without a confirmed birth time, we will use a noon chart for planetary positions (which are accurate for all planets except the Moon, which moves about 12 degrees per day) and flag all house-dependent interpretations as approximate. The planetary interaspects — which make up the majority of a synastry reading — remain fully valid.

Can I order a synastry reading for a relationship that has ended?

Yes, and it is often the most clarifying thing you can do after a significant relationship ends. Understanding the synastry of a past bond — particularly one that felt fated, or that ended in a way that still does not quite make sense — tends to bring a level of closure that other kinds of reflection cannot offer. The chart does not change when the relationship does.

How is this different from a free synastry calculator?

A calculator identifies the aspects and labels them. A Nuastro reading interprets them — in context, in relation to each other, and as part of the larger picture of what exists between these two specific people. The difference is between a list of ingredients and someone who actually cooks with them.