☉ Sun ∠ Semisquare ♂ Mars

45° · minor aspect · tense · default orb ±2°

At the semisquare, the Sun's significations of vitality, sovereignty, and honor meet those of Mars, force, contest, and iron, through a forty-five degree angle classed since the Renaissance as mildly inharmonious. Practitioners who work with minor aspects describe the figure as a lesser echo of the Sun-Mars square: authority chafing against aggression, pride and impulse producing recurrent small collisions rather than open rupture. The domains the tradition ties to the two planets, command and soldiery, competition, the physical assertion of the ruling impulse, appear here as background heat, friction that accompanies effort without defining it.

Traditional reading

Doctrinal texture comes chiefly from the classical relationship of the bodies rather than the angle, which no ancient source employs. The Sun is exalted in Aries, a Mars-ruled sign, so reception frequently binds the pair, and sect doctrine sets them on opposite teams, the Sun leading the diurnal and Mars assigned to the nocturnal. In the order of speed the Sun is the swifter and therefore the applying body. The forty-five degree figure itself descends from the eighth-harmonic aspects systematized in the seventeenth century and revived by twentieth-century cosmobiology.