how far away can the average black hole pull a star into orbit?

Update:

unlike the parent star, black holes GAIN mass instead of shed it. not all black holes are the same mass as they were when they were stars.......

8 Answers

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• Mike
Lv 7
4 weeks ago

Depends on the mass of the black hole.

• 1 month ago

The "pull" of a black hole , as with any object ,extends to infinite distances .

The question is whether or not there are other forces acting on the "pulled" object , to counteract the pull of the black hole .

• 1 month ago

Gravity doesn't have a limit.

• 1 month ago

It depends on the mass of the black hole.

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• Jon
Lv 6
1 month ago

An "average" black hole is formed from a collapsing star, and would therefore have the same gravitational effects at most distances as the star had before its collapse. So you would not expect it to be pulling other stars into orbit.

• oyubir
Lv 6
1 month ago

It depends. Which black hole?

You've to understand that a black hole has not specific gravitational effect. It is just an object. As all object do, it pulls other objects, with a force (proportional to its mass, to the mass of the other object, and to the inverse of the square distance).

For example (it it not directly related to your question, but that example can help you to understand what I say about gravitational effect), if the Sun was magically replaced by a black hole of the same mass (but far denser, therefore, smaller), it would change absolutely nothing for Earth (apart a small detail: without light we would all die). Earth would continue to orbit around that black hole at a period of 1 revolution every 365.25 days, at a distance appox 150 millions km.

Being heavy is what create the intensity of a gravitational pull. Not being a black hole. The mass; not the density.

And there is no lower limit to the mass of a black hole. It doesn't have to be heavy (well, there is one limit. But it is some 1/100 of milligram).

The smallest known black hole is only 3 times heavier than our Sun. And the reason why we don't know any smaller, is just because it is not easy to spot dark objects if they are not heavy enough to have influence around them.

What makes people believe that black holes magically sucks everything around them, is because what happens when you get very close to their center (and reach the point where escape velocity is higher than light). But understand, that this can happen only because it is so small that it is possible to reach that point.

You can't reach the point where you are so close to the Sun that the escape velocity is higher than the Sun, just because you will have crashed on the surface of the Sun before than (that point would be under its surface). So, 1stly, you are already burned before. 2ndly, once you are under the surface, the gravity decreases instead of continuing to increase.

Black holes are so dense that the surface of the black holes is very close to the center. So you can get very close to it. That's all.

But if you keep your distance as we do with the Sun, you just orbit around it, as we do with the Sun. It is just a massive object, as the Sun is.

• 1 month ago

250 Million Light years

• Anonymous
1 month ago

they pull each other, as the star is stripped away.

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