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Elena goes to a mountain station to see a black hole and finds only stars in the telescope. The astronomer shows a photo and explains why the hole itself stays dark.
what an event horizon is, why a black hole is not seen like a star, and how the bright disk around it is different
Elena wants to see a black hole through the telescope. Mateo says light cannot leave after the event horizon, a hot disk can shine nearby, and a black hole is not a vacuum cleaner. Some form when a very massive star collapses, and supermassive ones are thought to sit at the center of many galaxies.
