The Sun trine the Moon
the Sun trine the Moon, within one nativity or between two charts in synastry
What the tradition reads
Within a single chart the Sun trine the Moon is read as the will and the feelings at peace with each other, a genuinely balanced personality in which what a person wants and what they emotionally need pull in the same direction without a fight. The tradition describes these natives as personally popular, self-confident and relaxed enough to put other people at ease around them; the one caution repeated alongside the praise is that harmony this complete can slide into avoiding conflict altogether, taking a stable inner life a little too much for granted rather than actively tending it. Between two charts, one person's Sun trine another's Moon is read as a natural, flowing compatibility in which the two simply cooperate, each able to rely on and depend on the other without strain. Sources note the same risk as in the natal reading: an ease this complete can leave a relationship short of the challenge or stimulation that some people need to feel fully engaged, even while it delivers real and durable support.
The story
A trine is a hundred and twenty degrees, a third of the circle; Ptolemy's chapter on the mutual configuration of the signs calls it, together with the sextile, harmonious, since the signs it joins are of the same kind, all masculine or all feminine, and sets the two against the square and opposition's discord. Solar and lunar deities are told, across mythologies, as close kin far more often than as unrelated strangers: siblings such as Amaterasu and Tsukuyomi in Japan, or, in Inuit myth, Igaluk and his sister the sun goddess Malina, who became sun and moon only after a violent conflict between them, the two still read as locked in an endless chase across the sky. A trine between the two lights draws on that same close kinship rather than on any peace the myth itself describes; the ease credited to this aspect comes from its own harmonious classification, not from the story behind the two lights.
Written from
- Ptolemy, Tetrabiblos, Book I, Chapter XVI (Ashmand translation, Project Gutenberg ebook 70850, https://www.gutenberg.org/files/70850/70850-h/70850-h.htm)
- Wikipedia, Aspect (astrology)
- Wikipedia, Lunar deity
- Wikipedia, Solar deity
- Cafe Astrology, Sun - Moon Aspects in the Natal Chart
- Cafe Astrology, Synastry: Sun - Moon Aspects
Corpus key aspect:Sun:Moon:trine.