Conjunction
Aspect Degree: 0
Degree Orbs: 8–10° (luminaries), 6–8° (planets)
Glyph: ☌
Description:
A conjunction occurs when two planets or points occupy the same zodiacal degree (within an orb, usually up to ~8° but exact at 0°). This aspect blends and fuses the energies of both bodies, creating a potent and unified force. Unlike aspects that challenge or harmonize from a distance, the conjunction represents total integration—sometimes harmonious, sometimes tense, depending on the nature of the planets involved.
KeyTraits:
- Brings focus, intensity, and amplification of the combined planets.
- Can be constructive or destructive—the energies merge, so they must work together, willingly or not.
- Often marks important beginnings, initiations, or concentrated power.
- Feels like the two planets are sitting in the same room, fully aware of and influencing each other.
Example Interpretation:
Moon conjunct Mars: Emotional courage and quick temper; feelings (Moon) and action (Mars) tightly bound.
Venus conjunct Saturn: Love and commitment entwined; beauty (Venus) shaped by discipline (Saturn).
Use in Practice:
In charts, conjunctions are power centers. They demand attention because they dominate the field they occupy, often shaping a core part of personality (natal) or a significant event.
aspects/major
🧮 Aspect Arithmetic
| Quantity | Value |
|---|---|
| Exact angle | 0.000000° = 0°00′00.0″ |
| Formula | 0° (bodies at the same longitude) |
| Harmonic number | H1 |
| Fraction of circle | 0 (unison) |
| Shortest-arc separation | 0.000000° |
| Explement (360° − angle) | 0.000000° |
| Orb (this vault) | 8–10° for luminaries, 6–8° for planets (modern convention); traditional: sum of moieties (Lilly) |
| Family | Major (Ptolemaic) aspects — harmonics 1, 2, 3, 4, 6 |
Glyph: the standard conjunction glyph is ☌ (Unicode U+260C CONJUNCTION). Earlier copies of this note printed ♂ (U+2642, the Mars glyph) — corrected in the header line.
Detection rule (all aspects): with Δ = |λ₁ − λ₂| mod 360 and d = min(Δ, 360 − Δ), an aspect of angle A (≤ 180°) is in orb when |d − A| ≤ orb. Applying vs. separating is decided by whether |d − A| is shrinking or growing as the faster body moves.
🔗 Related
- Family: 1 Major · index
- Siblings: Opposition, Sextile, Square, Trine
- All aspects: Aspect Index · Aspects README
Traditional and modern attributions above are optional correspondences. Within Astrology Arith(m)etic the definition at the top of this note is the working law.
Sources (aspect arithmetic)
- Claudius Ptolemy, Tetrabiblos (2nd c. CE), Book I — trans. F. E. Robbins, Loeb Classical Library 435 (1940), public-domain text at LacusCurtius: https://penelope.uchicago.edu/Thayer/E/Roman/Texts/Ptolemy/Tetrabiblos/home.html
- William Lilly, Christian Astrology (London, 1647), Book I (houses, orbs p. 107, essential dignities table p. 104) — public domain; orb table transcribed at https://www.renaissanceastrology.com/aspects.html and https://www.skyscript.co.uk/aspectorbs.html
- Unicode Consortium, Miscellaneous Symbols (U+2600–26FF) and Alchemical Symbols (U+1F700–1F77F, incl. Unicode 15.0 dwarf-planet glyphs) code charts: https://www.unicode.org/charts/