Black holes Q: what is escape speed? Q: what is a black hole? Size? What is the...

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Physics

Black holes

Q: what is escape speed?

Q: what is a black hole? Size? What is the event horizon?

Q: How to “see” black holes if they are black? Evidence forstellar mass black holes? Supermassive black holes?

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Escape velocity is the speed that an object needs to be traveling to break free of a planet or moons gravity well and leave it without further propulsion A black hole is a region of spacetime exhibiting gravitational acceleration so strong that nothingno particles or even electromagnetic radiation such as lightcan escape from it Black holes are singularities points of    See Answer
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