Semisquare

Definition

A semisquare is a minor aspect of forty-five degrees between two planets. It is half of a square, and it carries a similar register: friction, irritation, a request for adjustment. The semisquare is sharper than a semisextile and softer than a square: a small thorn in the chart rather than a hard problem to solve, and it shows up most clearly when its orb is tight.

In context

If natal Mars sits at ten degrees of Aries and natal Saturn sits at twenty-five degrees of Taurus, the two form a semisquare across forty-five degrees. The chart describes a low-volume tension between the planet that initiates and the planet that limits: they catch each other on small details rather than on large structural conflicts. Astrology tends to read the semisquare alongside the major aspects, as a fine seasoning on the louder geometry.

To go deeper

The semisquare belongs to the minor-aspect family of tense small angles:

• Sesquisquare: one-hundred-thirty-five-degree minor aspect.
• Square: the ninety-degree parent of the semisquare.
• Minor aspect: family of secondary geometries.