Einstein does a thought experiment: imagine you crush the entire mass of a star to a point. He doesn't ask how this is possible or how nature could do such an absurd thing. And then he asks of Einstein's equations to reveal to him what the nature of the curved spacetime is as a result of that. "He couldn't believe it's six months after Einstein publishes his theory"
How do supermassive black holes form? Neil deGrasse Tyson and comedian Chuck Nice come to you live to learn about the history of black holes, what’s inside them, and new discoveries with cosmologist Janna Levin and astrophysicist Jenny Greene.
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Photo Credit: ESO/WFI (Optical); MPIfR/ESO/APEX/A.Weiss et al. (Submillimetre); NASA/CXC/CfA/R.Kraft et al. (X-ray)Derivative work including grading and crop: Julian Herzog, CC BY 4.0, via Wikimedia Commons
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