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Thread: 3 Questions. Black hole related.

  1. #1 3 Questions. Black hole related. 
    Forum Sophomore somfooleishfool's Avatar
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    1: How close could a planet get to a black hole before it was uninhabitable.

    2: What would be the first things you would notice if you lived on a planet that was in close proximity to a black hole, I assume extreme king high tides, but what else?

    3: What would be the first thing to kill you living on a planet close enough to a black hole.


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    Quote Originally Posted by somfooleishfool View Post
    1: How close could a planet get to a black hole before it was uninhabitable.
    Well, it probably wouldn't be habitable long before it approached the black hole. By our standards, anyway.
    Habitable planets tend to like orbiting glowing warm suns, instead of cold dark holes. Whatever the distance.

    Quote Originally Posted by somfooleishfool View Post
    2: What would be the first things you would notice if you lived on a planet that was in close proximity to a black hole, I assume extreme king high tides, but what else?
    I think you may be assuming a bit too much here.
    If our own sun were to "magically" (I use magic to avoid the Nova problem as well as that our sun lacks sufficient mass to collapse into a black hole without some outside force) turn into a black hole, right now, the only difference we would notice would be that it's kinda cold and kinda dark.
    The mass that was in the sun is the same as what is in the black hole (Because we used magic, it lost no mass to going Nova). See- so we would have the same orbit and no 'new' gravitational effects.
    This question would need to be more specific. And even then the answers would be pretty straight forward.
    Quote Originally Posted by somfooleishfool View Post
    3: What would be the first thing to kill you living on a planet close enough to a black hole.
    Maybe some native life form...
    Operator error.
    Ok, close enough in what way? If you were on a planet in orbit around a Black Hole, you wouldn't feel any spectacular gravitational effects other than the gravity of the planet that you are on.
    If the planet was close enough to a black hole that you could feel the pull of the black hole, you wouldn't have to worry about what would kill you first- you'd already have been dead.


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    Forum Ph.D.
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    Isn't the stellar vacinity of a black hole rather "hot" in terms of radiation generated by the stuff falling in and being acceleratedby gravity?
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    Isn't the stellar vacinity of a black hole rather "hot" in terms of radiation generated by the stuff falling in and being acceleratedby gravity?
    this usually happens if there is a companion star that the BH can steal matter from. if, in neverfly's scenario, our Sun isn't accreting anything, apart from a few comets, there would be no polar jets, accretion disc and x-rays.
    Sometimes it is better not knowing than having an answer that may be wrong.
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