anyways, considering the growing possibility of a black hole closer to our own (binary?) solar system than previously though, it's alittle comforting
to learn that even if our Sun turned into a black hole overnight, it doesn't necessarily mean Earth would be guaranteed to be swallowed up even over
much time. a possibility yes but apparently certain bodies would stay in orbit/moment/acretion?
I would have never thought it could blow something out! And the fact/theory that it could be the size of the sun and not draw in the other planets is
odd. I think we might move at least a few inches if it were the size of the sun. After all it would take about 1.3 million Earths to fill up a sun.
If the Sun became a black hole, the resultant black hole would have the same mass as the Sun (things don't gain mass just by becoming a black hole,
they just get crammed into a smaller volume), so it would have the exact same gravitational pull. All of the planets, asteroids, comets, and other
assorted orbiting objects would stay exactly where they are.
Even if the black hole is the same mass as the sun they are suppose to have such heavy gravitational pull that not even light can escape from its
clutches. Actually there is a thing called the event horizon where if your in it the gravitational pull is so strong that you are pulled in at the
speed of light! But hey you might be right. Maybe its gravitational pull is only so strong at a short distance.
The gravitational force at the black hole's "surface" (it's event horizon) is only so strong because it's so compact, making it much closer to
the center of gravity. At the event horizon, the gravitational pull is ridiculously strong, but at the distance of the Earth, for example, it's just
as strong as that of the Sun. Also, at a distance equal to the radius of the Sun, the gravitational pull of the solar-mass black hole would be just as
strong as that at the surface of the Sun now.
Yes...for the detail oriented, they wouldn't be exactly the same, but the mass itself stays the same (the common misconception being that the
mass of the star magically increases when it becomes a black hole). Given the rotation rate of the Sun, we could calculate the tidal effects if we
wanted to. I'll leave that to you
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