Black Holes
Black holes are regions in space where gravity is so strong that nothing, not even light, can escape from them. They form when massive stars exhaust their nuclear fuel and collapse under their own gravity, according to the theory of General Relativity. This theory, proposed by Albert Einstein, describes gravity as the warping of spacetime around massive objects. The boundary around a black hole is called the event horizon; once crossed, escape is impossible. Black holes can vary in size, from stellar black holes a few times the Sun's mass, to supermassive ones millions or billions of times larger, typically found at galaxy centers.
Additional Insights
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Black holes are regions in space where gravity is so strong that nothing, not even light, can escape from them. They form when massive stars collapse under their own weight at the end of their life cycle. The boundary around a black hole, called the event horizon, marks the point of no return. Inside, the laws of physics as we know them break down. Black holes can vary in size; some are several times the mass of the Sun, while others, known as supermassive black holes, can be billions of times heavier and are often found at the centers of galaxies.
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A black hole is a region in space where gravity is so strong that nothing, not even light, can escape from it. This intense gravity occurs when a massive star collapses after exhausting its nuclear fuel. Black holes can vary in size, from stellar black holes, formed from dying stars, to supermassive black holes, found at the centers of galaxies. Their presence can be inferred by observing the behavior of nearby stars and matter, leading to the idea that they play a crucial role in the evolution of galaxies and the universe as a whole.