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Black holes are regions where gravity is so intense that nothing, not even light, can escape once it crosses the point of no return called the event horizon.
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Event horizons aren't solid surfaces—they're invisible boundaries where spacetime curves so severely that escape velocity exceeds the speed of light itself.
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Black holes form when massive stars collapse at the end of their lives, compressing enormous amounts of matter into an incredibly tiny, dense space called a singularity.
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Q
How is time impacted?
Near a black hole's event horizon, time literally slows down relative to distant observers—a phenomenon called gravitational time dilation predicted by Einstein's relativity.
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Hawking radiation suggests black holes aren't completely black—they slowly emit particles and energy, eventually evaporating over trillions of years.
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Black holes come in different sizes: stellar black holes form from dead stars, while supermassive black holes millions of times heavier lurk at galaxy centers.
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Black holes might connect to parallel universes through wormholes, though physicists debate whether these theoretical shortcuts actually exist or remain mathematically impossible.
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Neutron stars are black hole cousins—so dense a teaspoon weighs billions of tons, yet they're stable enough to spin thousands of times per second without collapsing.
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Pulsars are rapidly spinning neutron stars that emit beams of radiation like cosmic lighthouses, helping astronomers detect distant objects invisible to telescopes.
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COMPLETE
The densest neutron star matter might transition into exotic "quark matter" where individual quarks roam free—physics that only exists in neutron star cores.
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