☉ Sun □ Square ☽ Moon
90° · major aspect · tense · default orb ±7°
The square of Sun and Moon sets the two luminaries at ninety degrees, the light of vitality and authority at friction with the light of body and feeling, an angle Ptolemy classed among the inharmonious. In the classical scheme this configuration corresponds to the quarter Moon, and older sources read it as a tension between the conscious, willing principle of the Sun and the instinctive, nurturing principle of the Moon. The tradition ties the pairing to inner division between purpose and habit, between the demands of station and the pull of the domestic. Medieval authors weighed the luminaries above all other significators, so friction between them read as fundamental to the temperament.
Traditional reading
The two luminaries head the opposing sects, the Sun ruling the day and the Moon the night, so their square reads as a meeting of the chart's two governing lights across that divide, each strong in its own domain but pulling against the other. The Moon, swiftest of all bodies, applies to the Sun and forms the figure, her phase tracked closely by the tradition. Reception colors the reading where one luminary occupies the other's house, the Sun in Cancer or the Moon in Leo. Older texts read the natal square as the quarter Moon's tension written into the temperament.
Classical reading
Ptolemy classifies the square (quartile) as inharmonious, formed by signs of the same modality. Described as friction or productive tension.
Modern reading
Modern reading: creative tension. The two bodies push against each other, generating energy that demands resolution.
The two bodies
Other Sun–Moon aspects
More on the Square aspect in general.
Reference, not advice
This is cultural and astronomical reference, not personal prediction or advice.
Last reviewed .