Sextile
A friendly 60-degree angle between two points — enough distance to be its own thing, close enough to work together without much friction.
A sextile sits at 60 degrees, one-sixth of the full circle, and it's usually read as an easy, cooperative angle: the two points involved are different enough to bring something separate to the table, but close enough in relationship that the difference doesn't create real tension. Where a square forces a choice, a sextile tends to offer one instead, an opportunity that still needs a person to actually take it up rather than arriving on its own. It shows up often between signs of a matching temperament, air and fire, or earth and water, sharing enough in common to cooperate readily. Of the five aspects in regular use, it's usually named alongside the trine as the pair read as the easiest going.