Opposition
A 180-degree angle between two points, directly across the wheel — two things facing each other, needing balance rather than a winner.
An opposition sits at 180 degrees, exactly across the circle, the widest angle two points can hold. It's usually read as two forces that are each real and each need accounting for, rather than one canceling the other out — the chart's own way of holding two true things in mind at once. Full moons happen at an opposition between Sun and Moon, part of why they're read as a moment of culmination rather than a quiet beginning. Oppositions often show up strongly in how two separate charts sit against each other, which is the whole premise behind Composite, a chart built from two people's charts at once rather than one. Balanced well, an opposition reads less like conflict and more like two ends of the same rope, each keeping the other taut.