Event Horizon
13.8 Ga — Black Hole Boundary
The boundary where the future stops being a choice and becomes a place you are already inside.
The Edge of Inevitability
e usually think of the future as open, a set of possibilities we choose between. The Event Horizon is the boundary where that freedom ends. Past this surface, the speed needed to escape exceeds the speed of light—the speed of causality itself. To cross it is to leave the shared universe of cause and effect.
Inside, the geometry of spacetime tilts. All paths lead inward. The Singularity becomes not a place in space, but a moment in your future. Inevitability: a future you cannot dodge, only meet.
Event Horizon
The edge of no return, where the future becomes inevitable and time's arrow points only inward.
Time's Arrow Becomes Gravity
General Relativity fuses space and time into one fabric. Near an event horizon, that fabric warps to the breaking point. A distant observer sees a clock falling into the hole tick slower and slower, taking infinite time to fade. For the traveler, the watch ticks normally, but space itself falls faster than light.
Gravity pulls on time. The arrow that usually points from past to future now points from horizon to singularity. You can no more avoid the center than you can avoid next Tuesday.
The Boundary of Knowledge
The Event Horizon opens this archive because it defines the limit of what we can know. Time is usually something we measure and pass through. Here, time becomes a wall. We can describe the physics up to the edge; what happens inside—whether time ends, loops, or becomes something else—stays hidden.
Our understanding of time is local. We assume the future is something we walk into. The black hole shows that the future can swallow us whole.
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