Aspects in Astrology

What are aspects in astrology?

An aspect is an angular relationship between two planets or points in a birth chart, measured as the distance in degrees between them along the 360° circle of the zodiac. When that distance comes close to certain key angles, astrologers say the two planets “aspect” each other: their themes meet and start to colour one another. Signs describe a planet’s style and houses its field of life; aspects describe its connections.

The five major aspects divide the circle by one, two, three, four and six:

Aspect	Angle	Exact sign relationship*	Tone
Conjunction	0°	same sign	fusion, intensity
Sextile	60°	two	opportunity, easy cooperation
Square	90°	three	tension, pressure to act
Trine	120°	four	flow, natural talent
Opposition	180°	six	polarity, awareness through others

*These sign relationships describe the exact angles. With an orb, planets near sign boundaries also form out-of-sign aspects: 29° Pisces and 1° Aries are a 2° conjunction despite falling in different signs.

The trine and sextile are called soft or harmonious aspects, and the square and opposition hard or dynamic ones. A conjunction is neither inherently harmonious nor inherently difficult: its tone comes from the planets it joins. Beyond these five sit the minor aspects, among them the semi-sextile (30°), the semi-square (45°), the quintile (72°) and the quincunx (150°). They add detail, but they work at a lower volume and with much smaller orbs, so most readings begin and end with the majors.

Aspects are counted between the planets, from the Sun and Moon out to Pluto, and also to the angles of the chart, above all the ascendant and the midheaven. A planet that touches the ascendant by aspect colours the way you meet the world, one that touches the midheaven the way you are seen in public life.

A short example makes it concrete. With the Moon at 10° Taurus and Saturn at 12° Leo, the two stand 92° apart: a square. Feelings (the Moon) and duty (Saturn) are locked in a tense dialogue, and that tension becomes a recurring theme in the person’s life.

The history of aspects

The word comes from the Latin aspectus, “a look” or “a view”, from aspicere, “to look at”. Hellenistic astrologers pictured planets as seeing one another across the zodiac: a planet that could see another could influence it, and one that could not see it stayed apart from it.

In the second century AD, Ptolemy’s Tetrabiblos grounded the major aspects in geometry and in the musical ratios of the Greeks: halving the circle gives the opposition, a triangle the trine, a square the square, a hexagon the sextile. Medieval astrologers sorted them morally, calling the trine and sextile aspects of friendship and the square and opposition aspects of enmity. In the early seventeenth century Johannes Kepler proposed new angles such as the quintile (72°), and the family of minor aspects grew from there.

Twentieth-century psychological astrology changed the tone. Hard aspects stopped being misfortunes and became sources of motivation and growth; soft aspects stopped being pure luck and became gifts that still need to be used.

What to look at when reading aspects

Name the two planets first. An aspect is always a sentence with two subjects. Venus–Mars speaks of desire and affection; Mercury–Saturn of thinking and discipline; Sun–Moon of will and need. Before thinking about the angle, say what each planet wants.

Then judge the angle. The conjunction merges, the sextile and trine connect easily, the square and opposition create friction. Easy does not mean better and hard does not mean worse: a trine can make you lazy about a talent, while a square can make you build one.

Check the orb. The tighter the aspect, the louder it speaks. A square with an orb under 1° deserves close attention; a trine with a 7° orb has a looser connection. Weigh both alongside the planets and the rest of the chart. Aspects to the Sun, the Moon and the ascendant also weigh more than aspects between slow outer planets, which whole generations share.

Notice whether it is applying or separating. When the faster planet is still moving towards the exact angle, the aspect is applying and feels like something building; when it has already passed, the aspect is separating and feels more familiar, like a lesson already in hand.

Look for patterns. Two planets opposite each other with a third squaring both form a T-square; three planets in trine with one another form a grand trine. Patterns like these often describe the main storyline of a chart.

Remember what aspects do not say. No aspect predicts an event. A Mars–Saturn square does not mean an accident; it describes energy that wants to rush meeting a voice that says “not yet”.

Open Birth Chart in the Larisa app with your birth date, time and place to look at the major aspects in your chart. When the time is unknown, the app uses about 12:00 noon, so the rising sign, houses and MC are approximate.

Aspects in four example charts

Sun trine Jupiter. In a psychological reading, Sun trine Jupiter connects identity with optimism, generosity and a wish to grow. Ask how those themes are expressed, rather than assuming that other people trust the person in return. The question the aspect asks is whether that ease turns into growth or just into comfort.

Moon opposite Venus. Emotional needs (the Moon) and the wish for harmony and pleasure (Venus) sit on two ends of a seesaw. Such a person may feel they must choose between being looked after and being admired, and often meets this split through a partner before seeing it in themselves.

Mercury square Neptune. Imagination is rich, while precise detail slips away. Poetry, music and empathy flourish; contracts and timetables need a second look. The square does not call the mind confused: it asks for a structure that can hold the imagination.

A borderline case: a planet with only easy aspects. Mars in trine and sextile to several planets, with no hard contact, acts smoothly but may lack an edge. Its owner sometimes needs outside pressure, a deadline or a rival, before the drive really shows.