The event horizon is a black hole's point of no return
Beyond a black hole's event horizon, gravity is so powerful that nothing, not even light, can escape, making it the ultimate point of no return.
The event horizon marks the boundary of a black hole, where gravity becomes so extreme that nothing, not even light, can escape. This concept, predicted by Einstein's theory of general relativity, means the escape velocity at this point equals the speed of light itself. This makes black holes invisible, detectable only by their effects on surrounding matter.
There's more to this story — open the app to keep reading.
Continue Reading in App
2 more paragraphs · plus a 4-question quiz