Aspects in Astrology

In astrology, an aspect is the angle between two planets in a birth chart, measured in degrees as seen from Earth. The five major aspects are the conjunction (0°), sextile (60°), square (90°), trine (120°) and opposition (180°). The tradition reads each as a kind of connection, and Astrolivo shows them when the birth time is known.

Aspects at a glance

• Major aspects: conjunction 0°, sextile 60°, square 90°, trine 120°, opposition 180°
• Measured in: degrees and minutes of ecliptic longitude between two points
• Orb: the leeway around the exact angle; it varies by aspect, by planet and by astrologer (for example, up to about 10° for a conjunction and 4–5° for a sextile)
• Shown in Astrolivo: the five major aspects, with a known birth time; minor aspects are not shown

An aspect is read in two parts. The two planets say which themes are involved, and the angle says how the tradition sees those themes meeting: merged in a conjunction, pulling against each other in a square, running smoothly in a trine. The signs and houses the planets occupy can be weighed too. The tradition also gives some planets a tone of their own: Mars and Uranus are said to ignite, while Saturn holds back and Neptune dissolves and blurs.

The "signs apart" column is plain arithmetic. The zodiac is twelve 30° sectors, so 60° covers two signs, 90° three, 120° four and 180° six. Counted that way, each angle lands on signs that have something in common. Signs two apart share a polarity, so a sextile joins Fire with Air or Earth with Water. Signs three apart share a modality, so a square links, for instance, two cardinal signs. Signs four apart share an element, and signs six apart are a sign and its opposite. The count is a shortcut, not the rule: aspects are measured in degrees, and an aspect can cross a sign boundary when a planet sits near the edge of its sign, as the example under Orbs shows.

An opposition is 180°, half the circle, so the two planets face each other from opposite sides of the chart. The tradition links it with contrast, balance and perspective. It ties two themes together without fusing them into one the way a conjunction does. The main axes of a chart are themselves oppositions, and astrologers read the aspect as a relationship that can work either way: oppositional, with each side pushing back, or complementary, with each side completing the other. Some astrologers add that planets in opposition tend to exaggerate, since the aspect is two-sided by nature and the issues it raises often feel tense.

Counted in whole signs, an opposition joins a sign with the sign directly across from it. Those two always share a modality and a polarity, while their elements differ, with Fire across from Air and Earth across from Water.

Take an example chart with the Moon at 10° Cancer and Saturn at 14° Capricorn. They are 176° apart, an opposition with a 4° orb. Cancer is cardinal Water and Capricorn is cardinal Earth, and each planet sits in the sign it rules: the Moon rules Cancer, Saturn rules Capricorn. An astrologer would set the Moon's themes against Saturn's, look for the balance between them, and note Saturn's traditional role as a planet that holds back.

An aspect does not have to be exact. The orb is the leeway around the exact angle: how far the measured distance may stray from 0°, 60°, 90°, 120° or 180° and still count as that aspect. The closer an aspect is to exact, the stronger or more dominant it is said to be.

There is no single orb table. The allowance changes with the aspect, with the planets involved and with the astrologer, so any set of numbers is a guide rather than a standard. One reference set runs like this:

• Conjunction: up to about 10°; some astrologers use a maximum of 8° when neither the Sun nor the Moon is involved
• Sextile: 4–5°
• Square, trine and opposition: 5–10°, depending on the planets

Orbs are also why the signs-apart count is only a shortcut. Take an example chart with Mars at 28° Aries and Saturn at 2° Leo. Aries and Leo are four signs apart, the whole-sign distance of a trine, yet the two planets are 94° apart. Measured in degrees, that is a square with a 4° orb, well inside the square allowance listed above, and nowhere near the 120° of a trine.

Medieval astrology treated certain aspects and planets as favorable or unfavorable. Modern usage puts less weight on those fatalistic distinctions, but two labels are still in use: the sextile and the trine are called easy aspects, and the square and the opposition hard ones. The conjunction can fall on either side, depending on the planets involved.

Each label names a kind of connection. Easy aspects are said to give talent room to grow. The trine is read as harmony, ease and what comes naturally, and the sextile as a milder version of the same, with a note of opportunity. Hard aspects are said to raise a challenge that calls for some adjustment before balance is reached. The square is read as strong tension that can be put to use, and the opposition as a pull between two sides that asks for perspective.

Neither label grades a chart or the person behind it, and the readings describe themes, not diagnoses. Astrology is an interpretive tradition, not a scientifically validated method, so treat easy and hard as ideas to reflect on rather than facts about you.

The tradition also uses minor aspects, such as the quincunx at 150°, and names configurations of several planets, such as the T-square, grand trine, yod and stellium. Astrolivo shows only the five major aspects; minor aspects are not shown, and neither are configurations.

Your own aspects are in your birth chart. Enter your date, time and city of birth; the chart is free, and no sign-up is needed to see the result. With a known birth time it shows the 10 bodies from the Sun to Pluto, the Ascendant and Midheaven, the house of each body and the five major aspects between the planets. What each body stands for is covered under Planets, and the terms on this subject are collected in Learn astrology.

See the aspects in your chart (birth time needed)

FAQ

How do you find aspects in a birth chart? Take the distance in degrees of ecliptic longitude between two planets, measured the shorter way around the circle, and compare it with the five major angles. If it falls within the orb of one of them, the two planets form that aspect: 86° between them, for instance, is a square with a 4° orb. With a known birth time, Astrolivo's birth chart shows the five major aspects for you, with one maximum orb of 6° for all five.

Are there positive and negative aspects in astrology? Medieval astrology called certain aspects favorable or unfavorable. Modern usage puts less weight on that split and speaks of easy aspects (sextile, trine) and hard ones (square, opposition) instead. Both words describe how two themes meet, smoothly or under tension; neither one predicts how things turn out.

Can I see aspects without a birth time? Not in Astrolivo's chart. If the birth time is unknown, the chart is calculated for 12:00 noon and marked as such, and the aspects are hidden along with the Ascendant, Midheaven, houses and exact degrees.

Instead of relying on a single noon position, the calculator checks for any sign changes across your entire local birth date. If the Sun, the Moon, or another planet changes sign during that local day, the result shows each possible sign for that day rather than guessing a single one.

How this page was made

Prepared by the Astrolivo editorial team from the Wikipedia articles "Astrological aspect," "Astrological sign" and "Astrology and science" and the Astrolivo glossary, and fact-checked against them. Astrological meanings are given as the tradition's readings.