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Black Hole
Regions of spacetime where gravity becomes extreme

Black holes are regions of spacetime where gravity is so strong that nothing—not even light—can escape once it passes a boundary called the event horizon.
They form when very massive stars collapse under their own gravity, compressing matter into an extremely small region.
Surrounding many black holes is an accretion disk, made of gas and dust that heats up as it spirals inward. At the center lies a singularity, where density becomes extremely high and current physical theories can no longer fully describe what happens.
Although black holes are now well-supported by observations, their interiors remain one of the greatest open questions in modern physics.
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