Event Horizons
An event horizon is a boundary around a black hole beyond which nothing can escape, not even light. According to General Relativity, when a massive star collapses under its own gravity, it can create a region where the gravitational pull is so strong that any object crossing this boundary is trapped. To an outside observer, time appears to slow down for an object nearing the event horizon, making it seem as though it never quite crosses it. Essentially, the event horizon marks the point of no return in the universe’s most extreme gravitational field.
Additional Insights
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An event horizon is the boundary surrounding a black hole, beyond which nothing can escape, not even light. It marks the point of no return; once something crosses it, it cannot come back. To an outside observer, objects nearing the event horizon appear to slow down and fade due to the intense gravitational pull. The event horizon is not a physical surface but a theoretical border that defines the limits of a black hole's influence. It's central to understanding the nature of black holes and the effects of gravity in the universe.