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Listener Questions 41: Questions about the mass of the Universe, moons made of gas, and backyard blackholes.

Daniel and Kelly’s Extraordinary Universe

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The Event Horizon Is Growing Up

When an object falls into the event horizon it's because the next thing falling in has pulled the event horizon out over it. But just because you put an inch worth of rod doesn't mean the event horizon grows an inch. If we're talking about a really small black hole one you could stand next to safely then it actually wouldn't have that much gravity. Like if you take the Empire States building and you squeeze it down into a black hole it's gonna have as much gravity as the Empire StatesBuilding.

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