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Opposition aspect in the birth chart

An opposition is a hard aspect between planets separated by 180 degrees, with an allowed orb of 8 degrees on either side. It is read as tension between two themes that pull against each other. That friction can take effort to handle, and may also support growth through the way the themes meet.

The Opposition at a glance

Symbol
Opposition
Exact angle
180°
Orb allowed
±8°
Counted from
172° to 180°
Nature
Hard

A line across the zodiac

An opposition spans half of the circle. Its shape is a straight line across the circle, a diameter, and it belongs to the second harmonic. The planets stand six signs apart, in opposite signs. This geometry places them face to face across the chart, rather than side by side or at a right angle.

Opposite signs share a modality and a polarity pairing, but differ in element. That mix gives the opposition a particular contrast: the signs have a point of connection, yet approach it through different elements. In this site’s terms, the aspect is hard. Its straight across arrangement gives the two planetary themes a direct tension that may ask to be held in view together.

Two themes in tension

In ordinary life, an opposition can feel like competing pulls that both matter. A person may notice one theme becoming prominent when the other is active, or may have to keep adjusting between them. The aspect does not say which side wins. Its friction can call for effort and growth as the two themes are brought into awareness together.

A Sun–Moon opposition can describe tension between a sense of self and purpose, and feelings, needs, habits, and comfort. Mercury opposite Jupiter can set careful attention to daily information and how ideas are passed on against a wider search for meaning and belief. Venus opposite Mars can bring values and affection into contact with desire, anger, and the drive to act. These are possible readings, not promised outcomes.

Reading the orb

To spot an opposition, compare the planets’ separation around the zodiac. They are in opposition when the angle is 180 degrees, or within an orb of 8 degrees either side of that angle. A tighter orb means the planets are closer to the exact angle, so the contact is usually read more strongly. A wider orb means a looser connection.

The orb describes how close the measured angle is to 180 degrees; it does not describe how easy the relationship feels. Even a close opposition is not proof of a fixed event or a certain outcome. It is a symbolic way to consider tension between planetary themes, and the reading remains open to the person and context.

Questions

How far apart are planets in an opposition aspect?

They are 180 degrees apart by exact angle. An opposition is also counted when the separation falls within an orb of 8 degrees either side. The closer the angle is to 180 degrees, the tighter the orb, and the more strongly the contact is usually read.

Why are opposite signs linked with an opposition?

The planets stand six signs apart, in opposite signs. Those signs share a modality and a polarity pairing, but differ in element. The planets therefore face each other across the chart, with a point of connection and a difference in how the signs approach it.

What does a tight orb change in an opposition?

A tight orb means the planets are close to the exact 180-degree angle. The contact is usually given more weight in interpretation. A wider orb means the angle is less exact, so the opposition tends to be read more lightly. The orb does not tell you which theme matters more.

Does an opposition mean the planets cancel each other out?

No. In this site’s terms, an opposition is hard because the two themes can pull against each other and create friction. That does not mean either theme disappears. The tension can call for effort, and the contact may also support growth as both sides are considered.

Find the Opposition in your chart

Enter your birth details to list the Opposition aspects in your chart, each with its orb.

Plate 1. Birth details

Date of birth
Time of birth

24-hour clock, local time at the birthplace.

Type a town and pick it from the list. The name stays in your browser; only its coordinates are used.

My town is not listed

For example 48.86, 2.35 or 48°51′N 2°21′E. Copy them from a map app.

The most widely used system in Western astrology. Near the poles it cannot be calculated, and Porphyry is used instead.

Example chart: 15 June 1990, 14:30, London (an invented birth, not a real person)

Plate 2. Find yours

Oppositions in the example chart

This is the example chart. Enter your details above to see yours.

  • Jupiter opposite NeptuneOpposition, orb 2°11'Hard

    Jupiter opposite Neptune

    Big beliefs can meet blurred boundaries, making it harder to tell hope from assumption. Jupiter is associated with growth and meaning, Neptune with ideals and imagination, and that friction may call for careful attention.

  • Venus opposite PlutoOpposition, orb 3°27'Hard

    Venus opposite Pluto

    Your desire for closeness or pleasure may pull against the need to change and let go, creating strong feelings around what you value. This tension can invite growth, but intensity may be tiring.

  • Jupiter opposite UranusOpposition, orb 7°44'Hard

    Jupiter opposite Uranus

    The wish to expand meets a strong need for independence, and the two can pull in different directions. This may bring bold changes into ordinary plans, though keeping a steady course can take effort.

To the Ascendant and the Midheaven

  • Mars opposite Ascendant0°09'
  • Neptune opposite Midheaven0°58'
  • Uranus opposite Midheaven6°31'

See the full chart