Square
Two planets ninety degrees apart, three signs from each other. The aspect of friction: two agendas at cross purposes, forcing a move. Uncomfortable and productive in about equal measure.
The square divides the circle by four: ninety degrees, three signs. Squared signs share a mode, cardinal, fixed, or mutable, which is exactly why they clash; both insist on acting, in incompatible styles.
A square is friction that will not settle on its own. Each planet demands something and the demands cross, so the aspect gets things done the way an irritant does: by refusing to be ignored. The old books filed squares under hard aspects, and the modern reading keeps the sensation while noticing the payoff: people with tight natal squares tend to build real capacity around them.
In transits, a square marks a working season, not a punishment. The trouble the tradition warns about arrives mostly where the tension is denied a job.
See also