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by kloch
1492 days ago
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Some perspective that may help: If the Sun were replaced by black hole with the same mass as the Sun at the center of the Solar System we wouldn't automatically get sucked into it. A very cold Earth would continue to orbit the black hole exactly as it does the Sun today. Only if the Earth's orbit were perturbed by some other body would it have a chance of joining the black hole. |
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Not any more meaningfully than the chance of current-Earth being put on a trajectory to crash into the sun if its orbit were perturbed. A black hole doesn't magically have a stronger (instantaneous) gravitational pull than that of any other body; the same formula for gravitational force at distance D given object masses Mi is preserved. Now the typical means of formation for a black hole generally result in masses much greater than that of our sun, which is why they are generally heavier and, accordingly, stronger (and they gain mass as they suck up things around them, hence the "instantaneous" disclaimer above).