A minor aspect of 45° indicating tension and challenges that require action for resolution.
Definition
The semisquare is a minor astrological aspect formed when two planets are 45° apart, representing half of a square (90°). It is associated with internal tension, discomfort, and the need to address underlying issues. Unlike the square, which often manifests as external obstacles, the semisquare tends to operate more subtly, creating an inner restlessness or unease that pushes for action. It is often considered a triggering or activating aspect, requiring conscious effort to address the underlying dynamics. Symbolically, the semisquare represents a point of friction, where growth and change can occur through deliberate engagement with the challenges it presents. It often highlights areas where minor adjustments or corrections are needed to avoid larger complications. While not as prominent as major aspects, the semisquare can still indicate significant developmental themes in a natal chart, especially if tightly applying or involving luminaries or personal planets.
In a chart
In a natal chart, a semisquare is identified by two planets separated by 45°. Look for exact or near-exact degrees for stronger influence. Ignore wide or separating orbs.
Examples
- Mars at 15° Aries semisquare Venus at 0° Gemini
- Sun at 10° Leo semisquare Uranus at 25° Virgo

