Astrology Aspects: The Five Majors, Orbs and Patterns

For a quick summary, the homepage calculator covers aspects briefly alongside a full chart. This page goes further, and its inter-chart cousin, the aspects between two different people's charts, is covered on the compatibility calculator.

The five major aspects

☌ Conjunction 0°

A conjunction happens when two planets sit at (or very near) the same degree of the zodiac, so geometrically there is no angular gap between them at all. They occupy one point in the chart rather than relating across a distance. Because of that overlap, the two planetary energies do not so much cooperate as fuse: they behave less like two separate voices and more like one blended signal, for better or worse depending on what is actually joined together. When the pairing involves planets whose agendas are naturally compatible, this fusion can produce a concentrated, almost single-minded strength, since there is no internal negotiation slowing things down. When the pairing involves planets that want contradictory things, the same fusion can feel like being unable to separate two impulses long enough to examine either one clearly. In practice, a conjunction is often the hardest aspect for a person to describe objectively about themselves, precisely because both planets are so intertwined that their combined effect gets experienced as simply "how I am" rather than as a dynamic between parts.

⚹ Sextile 60°

A sextile forms when two planets are roughly sixty degrees apart, a gap that typically links signs sharing a compatible, complementary element (fire with air, or earth with water), so the two planets are close enough to communicate easily but far enough apart to remain distinct. The quality here is genuinely favorable, yet it is quieter and less automatic than people often assume: a sextile represents an opening rather than a guarantee, a door that stays available but does not open itself. Unlike aspects that push or fuse regardless of what the person does, this one tends to sit dormant until effort, curiosity, or circumstance activates it, which is why two people with the same sextile can have wildly different outcomes from it. Where it does get taken up, the resulting skill or connection tends to feel less effortful than the trine’s ease and less contested than the square’s friction - more like a resource that rewards initiative than one that simply hands over its benefit unasked. The real-world tell is a talent that a person mentions almost in passing, something they could develop further but have never quite made a priority.

□ Square 90°

A square occurs at a ninety-degree separation, connecting signs of the same modality, whether cardinal, fixed or mutable. That means the two planets involved want to act in the same urgent way but toward incompatible ends, producing structural friction rather than smooth cooperation. This is traditionally read as one of the more demanding aspects, and rightly so, because a square rarely resolves on its own; it keeps reasserting itself until the person makes an active decision or sustains ongoing work to reconcile the two competing demands. That very persistence is what makes squares so often the site of real, lasting development, since a person is forced to build a skill or a resolve that would never have been necessary if things had simply flowed. The texture of a square in daily life is recognizable as a recurring obstacle that shows up in slightly different clothing each time - the same underlying argument between two parts of the self, replayed across different circumstances until a workable answer is found. It is uncomfortable by design, but the discomfort is functional rather than merely punishing.

△ Trine 120°

A trine appears at a hundred-twenty-degree distance, which lines up three points of the same element around the wheel and gives the two planets involved a natural, unforced rapport. They are, in a sense, speaking the same underlying language from the outset. The character of a trine is ease: things move smoothly, without the resistance a square generates or the activation a sextile requires, and the two planetary functions simply support one another as a matter of course. The catch, ironically, is that this same effortlessness can work against the person, because a gift that never demands struggle is also a gift that is easy to take for granted, leaving real ability under-noticed or under-used simply because it never had to be fought for. Where a square forces growth through friction, a trine can let a talent coast along quietly in the background, available but rarely stretched to its actual limit unless something else in the chart or in life circumstances calls it forward. The everyday signature of a trine is the compliment a person shrugs off - "oh, that’s nothing" - about something other people had to work hard to learn.

☍ Opposition 180°

An opposition places two planets a full hundred-eighty degrees apart, directly across the chart from one another, so that geometrically they sit at opposite ends of the same axis rather than at any kind of oblique angle. Each one is, quite literally, the other's mirror image across the center. This creates a polarity: two chart factors pulling toward opposite priorities, each valid on its own terms, with the person caught in the middle trying to find a workable balance rather than a simple victory for one side. What makes oppositions distinctive is how often they are first encountered externally, projected onto another person - a partner, a rival, a parent - who seems to embody the very quality the individual has not yet recognized as also belonging to them, before the tension is eventually understood as an internal negotiation. Because the two ends are so far apart, an opposition rarely announces itself as one single problem; it shows up as a seesaw, a back-and-forth that swings from one extreme toward the other until enough self-awareness accumulates to hold both ends at once. That capacity to integrate rather than choose is generally what turns an opposition from a source of instability into a source of perspective.

Orbs: the allowed margin of error

An aspect is almost never exact to the degree, so astrologers use "orb" to describe how many degrees of margin, on either side of the perfect angle, still count as the aspect being active. A Sun ten degrees from a trine partner in this scheme is treated differently from a Sun one degree away, but both may still register as trine within a permitted range. This calculator applies a standard set of allowances: eight degrees for a conjunction or an opposition, seven degrees for a square or a trine, and five degrees for a sextile, since those wider or narrower windows roughly track how forceful each aspect type tends to be. On top of that base figure, the orb is widened by one additional degree for every personal light - the Sun or the Moon - involved in the specific pair being measured, so an aspect between the Sun and Moon receives the most generous allowance of all, while an aspect strictly among the slower-moving or minor bodies keeps the tightest window. It is worth being upfront that these figures are a convention rather than a fixed law of the discipline: different astrologers, different traditions, and different software packages all use somewhat different orb tables, and the values applied here simply represent the specific choice this calculator has made.

Aspect patterns

T-square

A T-square is built from three planets: two of them stand in opposition to each other across the chart, and a third planet squares both of the opposed pair at once, forming a right-angled T-shape rather than a closed loop. That third planet is usually called the apex, and it functions as a pressure point that absorbs the friction generated by both ends of the opposition simultaneously, rather than each side of the tension staying isolated to a single relationship. Experientially, this tends to produce a tension that is recurring rather than occasional: a theme that keeps resurfacing around the apex planet and whatever house it occupies, demanding attention again and again instead of settling once and being finished. Many people carrying a T-square describe it less as a burden purely to be endured and more as an engine: because the configuration will not simply go quiet, it often becomes an unusually persistent source of drive, pushing continued effort in the very area where it refuses to let up.

Grand Trine

A Grand Trine is formed when three planets sit roughly a hundred-twenty degrees apart from one another all the way around, so that each one trines both of the others and the three connecting lines close into a triangle rather than leaving any open end. Because a hundred-twenty-degree spacing usually falls within a single element, the three planets involved typically share that element in common, giving the whole configuration a consistent flavor. All fire, all water, and so on, rather than a mixture of competing temperaments. The lived effect tends to mirror the trine it is built from, only amplified across three points instead of two: an ease and a natural flow that circulate around the whole triangle without real resistance anywhere in the loop. Because nothing in a closed triangle of trines forces the person to work at it the way an opposing square would, the gift it represents is prone to being taken for granted, coasted on, or left undeveloped, since comfort rather than necessity is what a Grand Trine offers.

Yod

A Yod, sometimes called the Finger of Fate, starts with two planets in sextile to each other, and adds a third planet that stands a hundred-fifty degrees from each of the first two, an angle known as a quincunx or inconvenient, forming a narrow, needle-like triangle rather than the balanced shape a Grand Trine makes. The apex planet at the point of that needle receives two quincunxes, and because a hundred-fifty-degree angle connects signs that share neither element nor modality, there is no built-in common ground between the apex and either base planet the way there usually is with more familiar aspects. That mismatch is exactly why a Yod tends to feel like such a specialized, oddly specific pressure: the adjustment it calls for cannot be handled by any of the usual, generic responses, since nothing about the two base planets naturally explains what the apex needs. People often spend a large portion of their lives only half-aware of this pull toward the apex planet and its house, and it is frequently not until much later, after considerable trial and error, that its purpose becomes something they can name and consciously work with rather than simply feel as an unexplained itch.

Explore further

• See aspects on a real chartSee these aspects computed for a real chart, with the full aspect grid.
• Compatibility calculatorAspects measured between two different people's charts.
• How to read a birth chartWhere aspects fit into a full, step-by-step chart reading.