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In short: The opposition is a 180° angle joining opposite signs, which share a mode and have complementary elements (fire with air, earth with water). It is read as polarity: two sides of a question that seek balance, often experienced through other people. It is the aspect of awareness and relationship, and — like the 7th house — of partnership.
The geometry
| Angle | 180° (half of the circle) |
| Typical modern orb | 8–10° (wider with the Sun or Moon) |
| Signs apart | 6 |
Opposite signs lie on the same axis: Aries–Libra, Taurus–Scorpio and so on. They share a mode and a gender and have complementary elements. Ptolemy counted the opposition as a difficult aspect, but the axis itself is one of balance: each sign holds what the other lacks.
| Sign | Sign opposite | Elements | Modes |
|---|---|---|---|
| Aries | Libra | fire + air | cardinal + cardinal |
| Taurus | Scorpio | earth + water | fixed + fixed |
| Gemini | Sagittarius | air + fire | mutable + mutable |
| Cancer | Capricorn | water + earth | cardinal + cardinal |
| Leo | Aquarius | fire + air | fixed + fixed |
| Virgo | Pisces | earth + water | mutable + mutable |
By degree, an aspect can also form "out of sign" — for example, 29° of one sign to 1° of another — in which case the element relationship above does not hold.
In a birth chart
In a birth chart an opposition describes two functions that see-saw. A Sun–Moon opposition (being born at full Moon) is often read as a tension between will and feeling that seeks balance; a Venus–Saturn opposition, love and duty pulling apart. Oppositions are frequently 'projected' — one side is experienced through partners or rivals until it is owned.
The planets involved decide the tone. Aspects with the Sun and Moon are felt most personally; aspects with Saturn add weight and time; aspects with Jupiter and Venus add ease; aspects with Mars add drive; aspects with the outer planets (Uranus, Neptune, Pluto) are shared by everyone born within months of each other and are read as generational unless they touch a personal planet or angle.
In synastry
In synastry, oppositions produce strong attraction: the other person embodies what one lacks. Sun opposite Sun, or Venus opposite Mars, is common in close couples. The work is to treat the difference as balance rather than conflict.
In transits
Transiting oppositions — Saturn opposite natal Saturn at about 14–15 and 44, or Uranus opposite Uranus around 40–42 — are classic midpoints of cycles, read as times of awareness and adjustment.
The Vedic view
Every planet in Jyotish fully aspects the 7th sign from itself: the opposition is the one aspect all planets share. The 1st/7th axis is the axis of self and partner, and planets in mutual 7th aspect are counted as related for yogas — the Western and Vedic views converge here too.
FAQ
What orb is used for a opposition? A common modern orb is 8–10°, wider when the Sun or Moon is involved. Orbs are conventions; tighter aspects are read as stronger.
Is the opposition a good or bad aspect? Neither. It is dynamic: demanding, and often where growth comes from.
Does Vedic astrology use the opposition? Not as a measured angle. Jyotish counts aspects by sign, with its own rules; see graha drishti.
Sources
- Claudius Ptolemy, Tetrabiblos I.13 (aspects of the signs) (tr. F. E. Robbins, Loeb 1940)
- Brihat Parashara Hora Shastra, ch. 26 (aspects) (Santhanam)
- Robert Hand, Planets in Transit (1976)
- Stephen Arroyo, Astrology, Psychology and the Four Elements (1975)
Written by Sunyra Editorial. Astrology is a tradition of interpretation; read this as guidance, not a forecast. Disclaimer.
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