Aspects guide

Astrological aspects: the conversations of your chart

Aspects are the angles the planets form with each other in your chart. They describe how two planets talk to each other: in agreement, in tension, or hand in hand. This guide explains what an aspect is, what an orb is, and why no aspect is ever read alone.

What an aspect is

On your chart wheel, each body sits at a position in degrees. An aspect appears when two bodies form an angle close to a symbolic value. It is not a physical force: it is a geometry that tradition reads as a relationship, a thread stretched between two functions of your chart.

An aspect is never read alone. It links two bodies, each coloured by its sign and house, and it takes its meaning within the whole. An isolated aspect describes neither a character trait nor an event: it describes a way in which two forces answer each other.

The exact angle and the orb

Each aspect has an exact angle: 0° for the conjunction, 60° for the sextile, 90° for the square, 120° for the trine, 180° for the opposition. But bodies rarely land exactly on these values. The gap between the real angle and the exact angle is called the orb.

The angle gives the aspect type; the orb tells how tight it is.

The smaller the orb, the tighter the aspect, so the sharper and more present it is in the reading. An aspect within a few tenths of a degree is very exact; an aspect at the edge of the allowed orb is looser. Arcanastra shows an aspect only if its orb stays under a threshold, which varies by the bodies involved.

The aspects Arcanastra reads

Arcanastra calculates the five major aspects of the Western tradition. Here is their geometry and symbolic reading, to take as starting points, never as verdicts.

Conjunction (0°). Two bodies in the same place: their energies blend and amplify. Neither good nor bad in itself, its colour depends entirely on the bodies joined.

Sextile (60°). Traditionally read as an ease, an opportunity that asks for a little effort to take shape. A fluid but discreet dialogue.

Square (90°). Often associated with tension, a friction between two functions that do not spontaneously pull the same way. A friction that can also become an engine.

Trine (120°). Traditionally read as harmony, a talent that flows freely. Fluid, but sometimes so easy it goes unnoticed.

Opposition (180°). Two bodies face to face: a polarity to hold, often lived through relationships. A balance to find rather than a conflict to settle.

Arcanastra keeps to these five aspects: they are the most legible and robust. The sextile, more subtle, gets a tighter orb. Other minor aspects are not shown, to keep the reading clear.

Planet, sign, house, aspect

This is a reading model, not a scientific claim. Four different questions get answered: the planet says what (which function), the sign says how (in which style), the house says where (in which area of life), and the aspect says how the pieces interact with each other.

The planet, what. The sign, how. The house, where. The aspect, how it all answers.

An example: a square between Mars (action) and Saturn (limit) reads as a tension between drive and caution. It is not a flaw: depending on the rest of the chart, that friction can become perseverance. The aspect sets up a dynamic, it does not dictate an outcome.

There are no "good" or "bad" aspects

This is the most stubborn misconception. A trine is not automatically a blessing, nor a square a curse. A trine can lull a talent left unused; a square can forge a strength. An opposition is not a fatal conflict, but a polarity to balance.

Even the conjunction has no fixed value: it all depends on the bodies joined. So we read "can symbolize", "often read as", "traditionally associated with", never "this means you are" or "this guarantees".

An aspect is read within the whole

An aspect links two bodies, but it lives inside a whole chart. The sign and house of each body, the other aspects, the overall balance: everything enters the dialogue. Two people with the same Mars-Saturn square will not live it the same way.

That is why this guide stays general. A fair reading does not stack up meanings of isolated aspects, but looks at how the network holds together, with nuance and without promises about the future.

How Arcanastra calculates your aspects

Arcanastra calculates aspects from the exact positions (Swiss Ephemeris) between the ten planets, the lunar nodes axis (Rahu and Ketu) and the Ascendant when your birth time is known. For each pair of bodies, only the tightest aspect is kept.

The orbs are variable, by body: the luminaries (Sun, Moon) allow the widest orb, about 9°, personal planets about 7°, social ones 6°, slow ones 5°, the nodes 4°, the Ascendant 7°; the sextile gets a tighter orb. A pair's orb follows the more prominent body. Arcanastra announces neither a "forming" nor a "separating" aspect, nor a strength score: only the orb, the gap from the exact angle, counts.

See the aspects in your chart

To discover the aspects in your chart, you need your date, time and place of birth. Your free birth chart calculates them in seconds, in the "the links between your bodies" section, sorted from tightest to widest. No email, nothing kept of your data.

Frequently asked questions

Astrological aspects, made clear