event horizon
An event horizon is the boundary surrounding a black hole beyond which nothing, not even light, can escape. Imagine it as an invisible point of no return; once something crosses this threshold, it cannot communicate or return to the outside universe. This phenomenon occurs because the gravitational pull of a black hole is so strong that it distorts space and time. The event horizon marks the limits of our ability to see or gather information about what happens inside the black hole, making it a fascinating but mysterious aspect of astrophysics.
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An event horizon is a boundary around a black hole beyond which nothing can escape, not even light. Think of it as the point of no return; once an object crosses this boundary, it cannot communicate or send signals back to the outside universe. The event horizon marks the limit where gravity becomes so strong that escape is impossible, effectively trapping everything that crosses it. It's a fundamental concept in understanding black holes and the nature of gravity, illustrating how space and time behave in extreme conditions.