Aspects in a birth chart
An aspect is an angle between two planets in a birth chart. Astrologers read that angle as a symbolic link between the planets. Its type suggests whether the contact tends to feel flowing, challenging or more neutral, while its orb shows how close it is to exact. A tighter orb is generally read as a stronger contact.
Plate 1. The aspects
| Aspect | Symbol | Angle | Orb | Nature |
|---|---|---|---|---|
| Conjunction | 0° | ±8° | Neutral | |
| Opposition | 180° | ±8° | Hard | |
| Trine | 120° | ±8° | Flowing | |
| Square | 90° | ±8° | Hard | |
| Sextile | 60° | ±6° | Flowing | |
| Quincunx | 150° | ±3° | Neutral | |
| Semisextile | 30° | ±2° | Neutral | |
| Semisquare | 45° | ±2° | Hard | |
| Sesquiquadrate | 135° | ±2° | Hard | |
| Quintile | 72° | ±2° | Neutral |
Plate 2. Every page
The aspects, one by one
Conjunction
A conjunction places two planets at the same zodiac point, bringing their themes into close contact. Its neutral nature can blend or crowd them, while the orb shows how strongly the aspect is considered.
Conjunction in detailOpposition
An opposition places two planets across the zodiac, where their themes can pull in different directions. Its tension may call for attention and effort, and a tighter angle gives the contact more weight in interpretation.
Opposition in detailTrine
A trine links planets four signs apart in signs of the same element. This flowing contact can make their themes easier to combine, though its ease may be taken for granted.
Trine in detailSquare
A square links planets across a quarter of the zodiac. Its hard contact can feel like competing needs or aims, with friction that may call for effort and offer room for growth.
Square in detailSextile
A sextile joins planets with a supportive, low-friction connection. Its geometry links compatible elements, while its ease can be overlooked if the planets’ shared strengths are taken for granted.
Sextile in detailQuincunx
A quincunx links planets separated by 150 degrees across signs with no shared element, modality or polarity. It is a neutral contact that asks their different concerns to adjust.
Quincunx in detailSemisextile
A semisextile joins planets thirty degrees apart in neighbouring signs. Its neutral contact points to an adjustment between different concerns, with the closeness of the angle shaping how strongly it is read.
Semisextile in detailSemisquare
A semisquare is a hard aspect formed when two planets sit forty-five degrees apart. It links their themes through friction that may call for effort, while leaving room for growth.
Semisquare in detailSesquiquadrate
A sesquiquadrate links two planets through a hard angle that can feel like recurring friction. Its measured distance and tight orb help distinguish this contact from other aspects.
Sesquiquadrate in detailQuintile
A quintile links planets through a precise fifth-based angle. Its neutral tone points to an adjustment between parts of life that may not naturally share a way of working.
Quintile in detail
Angles connect planets
Astrologers use aspects to describe the angles between planets in a birth chart. The angle is measured against an exact position, such as conjunction (0°) or trine (120°). In this symbolic approach, an aspect offers a way to reflect on how the planets' themes may work together. It does not prove that a person has a fixed trait or that a particular event will occur.
The main aspects on this hub are conjunction (0°), opposition (180°), trine (120°), square (90°), sextile (60°) and quincunx (150°). Each has its own page, with more minor aspects to follow.
Orbs show closeness
An orb is the distance between the chart's actual angle and the exact angle of an aspect. Astrologers allow a limited orb for a contact to count, and the allowed distance can vary by aspect. For example, the listed orb is 8° for a conjunction, but 6° for a sextile and 3° for a quincunx.
The closer the angle is to exact, the tighter its orb. A tighter orb is generally read as a stronger contact, while a wider one may be read more softly. The orb helps describe emphasis, not certainty.
Contact styles differ
Trines and sextiles are usually called flowing contacts. They are associated with ease, cooperation or openings between planetary themes. Squares and oppositions are called hard contacts, as they tend to be read through friction, pressure or a need to balance different themes. These labels describe common interpretations, not fixed experiences.
Conjunctions and quincunxes are often treated as more neutral. A conjunction can intensify or blend planetary themes, while a quincunx can point to adjustment. Their meaning depends on the planets involved and the rest of the chart.
Questions
How do astrologers decide whether two planets form an aspect?
They compare the angle between the planets with the exact angle of a recognized aspect. If the difference falls within that aspect's allowed orb, it is usually counted. The orb varies, so the same distance from exact may count for one aspect but not another.
Does a tighter orb make an aspect more important?
A tighter orb is generally read as a stronger or more noticeable contact. It does not guarantee that the aspect dominates a chart or has one fixed meaning. Astrologers also consider which planets are involved and how the contact fits the chart as a whole.
Are flowing aspects always easier to experience than hard aspects?
Flowing aspects are associated with ease, while hard aspects tend to be read as points of tension or effort. These are broad symbolic descriptions, not rules for how someone must feel. The planets involved and the wider chart can change how an aspect is understood.
What does a neutral aspect mean in a birth chart?
Neutral means the aspect is not usually grouped as flowing or hard. A conjunction or quincunx may still carry meaning in an interpretation. Its role depends on the planets, the closeness of the orb and the other chart patterns around it.