The Opening of Time

The prevailing visual intuition in cosmology depicts time as an outward expansion from an initial point—a spiral or trajectory that grows, unfolds, and accumulates structure as it proceeds. In this paper, we propose that this visual framing is inverted. Time does unfold, but the unfolding occurs through progressive restriction rather than expansion. The admissible space of trajectories narrows over time, producing a convergent (inward) spiral in which structure, persistence, and irreversibility arise as consequences of tightening constraint. This correction does not revise existing physical descriptions of temporal unfolding; it clarifies the geometry implicit in observed phenomena such as vortices, gravitational horizons, nodal suppression, and black holes. We propose that the Big Bang corresponds not to an explosive origin but to the widest cross-section of admissible temporal structure—the opening of time—after which admissibility progressively contracts.