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-   -   Black Holes (https://www.askmehelpdesk.com/showthread.php?t=167153)

  • Dec 30, 2007, 06:21 PM
    Goldenwolf
    Black Holes
    Are Black Holes vortexes or something that take you somewhere else? I just wanted to know where do black holes take you. I know how they're made, (a really giant star collapsed on its on weight) but I wanted to know were they take you, when and who discovered. Thanks
  • Dec 30, 2007, 06:22 PM
    N0help4u
    Nobody knows. If someone tried to find out they wouldn't be able to come back to tell us where they go.
  • Dec 30, 2007, 06:23 PM
    Goldenwolf
    That was a fast answer
  • Dec 30, 2007, 06:31 PM
    Fr_Chuck
    They take you to the collasped star surface where the weight of the gravity would crush you.

    Someone is watching way too much sci fi as to openings to somewhere else.
  • Dec 31, 2007, 03:35 PM
    Goldenwolf
    Hahahaha lol
  • Dec 31, 2007, 03:36 PM
    Goldenwolf
    What about Einstein? He needed black holes to prove his theory, because light bended and stuff where the black hole was
  • Mar 10, 2008, 11:57 PM
    belsammael
    Agreed on the other answers given, however it should be noted that Kerr's solution states:
    * The properties of space-time between the two event horizons allow objects to move only towards the singularity.
    * But the properties of space-time within the inner event horizon allow objects to move away from the singularity, pass through another set of inner and outer event horizons, and emerge out of the black hole into another universe or another part of this universe without traveling faster than the speed of light.
    * Passing through the ring shaped singularity may allow entry to a negative gravity universe.

    However all of this is of course theoretical and unproven in any way, and even if proven would prove useless, since anything grasped by said black hole would be distorted and disrupted beyond restoration and usefulness.
  • Mar 11, 2008, 03:32 AM
    Capuchin
    What use is an alternate universe if you're dead? ;)
  • Mar 24, 2008, 08:49 PM
    Goldenwolf
    Thanks!
  • Mar 25, 2008, 03:34 AM
    Credendovidis
    Quote:

    Originally Posted by N0help4u
    Nobody knows. If someone tried to find out they wouldn't be able to come back to tell us where they go.

    Hmmm : so "heaven" could well be a black hole... :)
    :rolleyes:
    .
    Quote:

    Originally Posted by Goldenwolf
    Are Black Holes vortexes or something that take you somewhere else? I just wanted to know where do black holes take you.

    The entrance to a black hole is some form of funnel with the rim being the "event horizon" after which the strength of gravity is so big that all incoming matter and light enters a one-way street inwards, circles faster and faster to the bottom in the center, the black hole itself, where the conditions are as already indicated by others.
    .
    There is no reason - nor is there any theoretical support - for the assumption that a black hole provides passage to some other place (for instance by being connected to a "white hole"). Only the "Captain Kirks" under us normal human beings use black holes as shortcuts to other places.
    But than : Captain Kirk has "gone where no-one has gone before".
    If he or his shipmates ever got there, or ended up as black hole matter is not known, as nobody has "gone where Captain Kirk has gone before", and returned.
    :rolleyes:
    .
    Quote:

    Originally Posted by Goldenwolf
    I know how they're made, (a really giant star collapsed on its on weight) but I wanted to know were they take you, when and who discovered. Thanx

    That is just one way to make them. At Cern they expect to make (small) black holes also.
    But as small black holes tend to grow to big black holes, all our hope should be on Stephen Hawkins who predicted that ultra small black holes will evaporate. Let's hope he is right on that !
    :rolleyes:
  • Jun 10, 2008, 12:42 AM
    tiamokiss
    Quote:

    Originally Posted by Goldenwolf
    Are Black Holes vortexes or something that take you somewhere else? I just wanted to know where do black holes take you. I know how they're made, (a really giant star collapsed on its on weight) but I wanted to know were they take you, when and who discovered. Thanx

    Wow intresting I've always wanted to know more about black holes! I've seen that scary documentary on the Encyclopedia talking about how the wolrd is going to end by earth falling in oe of those black holes! Scary :\
  • Jun 10, 2008, 05:41 AM
    lalla1995
    Many scientist were say that black hole take any object to the another side of the universe but in small particle.
  • Jun 10, 2008, 09:43 AM
    Capuchin
    Quote:

    Originally Posted by lalla1995
    Many scientist were say that black hole take any object to the another side of the universe but in small particle.

    Do you have a source for this?
  • Jul 22, 2008, 12:45 PM
    DuBas07
    Quote:

    Originally Posted by tiamokiss
    wow intresting I've always wanted to know more about black holes !! I've seen that scary documentary on the Encyclopedia talkin about how the wolrd is goin to end by earth falling in oe of those black holes!! scary :\


    Theoretically our entire universe will eventually be nothing but black holes. When that happens the black holes will start to swallow each other and make even bigger black holes, maybe leading to another big bang?!
  • Jul 22, 2008, 01:26 PM
    tiamokiss
    Wow does anybody have a Video documentary for this?
  • Jul 23, 2008, 11:43 AM
    DuBas07
    Quote:

    Originally Posted by Capuchin
    Do you have a source for this?

    "As they gobble up nearby matter, the black holes generate X-rays, as well as many other forms of light. Other black holes also spew out jets of particles, which a related research project has determined are made up of protons and electrons."

    Discovery Channel :: News - Space :: Survey: Cosmos Packed With Black Holes
  • Jul 23, 2008, 02:29 PM
    Capuchin
    Quote:

    Originally Posted by DuBas07
    "As they gobble up nearby matter, the black holes generate X-rays, as well as many other forms of light. Other black holes also spew out jets of particles, which a related research project has determined are made up of protons and electrons."

    Discovery Channel :: News - Space :: Survey: Cosmos Packed With Black Holes

    I was specifically curious about the "takes an object to the other side of the universe" part.
  • Jul 23, 2008, 03:06 PM
    DuBas07
    Quote:

    Originally Posted by Capuchin
    I was specifically curious about the "takes an object to the other side of the universe" part.

    I meant to address that... :p
  • Jul 24, 2008, 02:29 PM
    DuBas07
    I thought the only thing that determined the size of a black hole is the amount of matter it consumes. It basically never ending, drawing everything in its gravitational field toward it. If it can consume our entire solar system it's a matter of time before it is consumed by another black whole or consumes a black hole. becoming massive. Not to mention that our galaxy is on a direct collision course with another galaxy possibly adding massive amounts of matter to our solar system. How far am I off?
  • Jul 24, 2008, 03:21 PM
    Capuchin
    Quote:

    Originally Posted by DuBas07
    I thought the only thing that determined the size of a black hole is the amount of matter it consumes. It basically never ending, drawing everything in its gravitational field toward it. If it can consume our entire solar system its a matter of time before it is consumed by another black whole or consumes a black hole., becoming massive. Not to mention that our galaxy is on a direct collision course with another galaxy possibly adding massive amounts of matter to our solar system. How far am I off?

    There's nothing special about black holes. If the Sun were to be replaced by a black hole of the same mass, we wouldn't notice any difference except for the lack of light! They don't suck things in, this is a common misconception - they act exactly like bodies of the same mass which are not black holes. - the gravitational field is not any stronger at the same distance. Anyway the sun is not massive enough to become a black hole - it will eventually shrink to a white dwarf.

    Of course there are some black holes that are more massive than any other known object. These are often the super massive black holes found at the center of large galaxies - and seem to have some important role in the formation of the galaxy (or vice versa).
  • Jul 24, 2008, 03:25 PM
    N0help4u
    Why does the hubble site say this then??
    HubbleSite: Black Holes: Gravity's Relentless Pull interactive: Encyclopedia

    Black holes grow in mass by capturing nearby material. Anything that enters the event horizon cannot escape the black hole's gravity. So objects that do not keep a safe distance get swallowed.

    Despite their reputation, black holes will not actually suck in objects from large distances. A black hole can only capture objects that come very close to it. They're more like Venus' Flytraps than cosmic vacuum cleaners. For example, imagine replacing the Sun by a black hole of the same mass. Permanent darkness would fall on Earth, but the planets would continue to revolve around the black hole at the same distance and speed as they do now. None of the planets would be sucked into the black hole. Our Earth would be in danger only if it came within some 10 miles of the black hole, much less than the actual distance of Earth from the Sun (a comforting 93 million miles).

    The diet of known black holes consists mostly of gas and dust, which fill the otherwise empty space throughout the Universe. Black holes can also consume material torn from nearby stars. In fact, the most massive black holes can swallow stars whole. Black holes can also grow by colliding and merging with other black holes. This growth process is what can reveal the presence of a black hole. As gas falls toward a black hole, it is heated to high temperatures, generating powerful radio waves and X-rays that can be studied by astronomers.

    The following pages showcase the supermassive black holes in the centers of two distant galaxies that reveal their presence through their very powerful radio waves and X-rays:
  • Jul 24, 2008, 03:37 PM
    Capuchin
    Quote:

    Originally Posted by N0help4u
    Why does the hubble site say this then????
    HubbleSite: Black Holes: Gravity's Relentless Pull interactive: Encyclopedia

    Black holes grow in mass by capturing nearby material. Anything that enters the event horizon cannot escape the black hole's gravity. So objects that do not keep a safe distance get swallowed.

    Despite their reputation, black holes will not actually suck in objects from large distances. A black hole can only capture objects that come very close to it. They're more like Venus' Flytraps than cosmic vacuum cleaners. For example, imagine replacing the Sun by a black hole of the same mass. Permanent darkness would fall on Earth, but the planets would continue to revolve around the black hole at the same distance and speed as they do now. None of the planets would be sucked into the black hole. Our Earth would be in danger only if it came within some 10 miles of the black hole, much less than the actual distance of Earth from the Sun (a comforting 93 million miles).

    The diet of known black holes consists mostly of gas and dust, which fill the otherwise empty space throughout the Universe. Black holes can also consume material torn from nearby stars. In fact, the most massive black holes can swallow stars whole. Black holes can also grow by colliding and merging with other black holes. This growth process is what can reveal the presence of a black hole. As gas falls toward a black hole, it is heated to high temperatures, generating powerful radio waves and X-rays that can be studied by astronomers.

    The following pages showcase the supermassive black holes in the centers of two distant galaxies that reveal their presence through their very powerful radio waves and X-rays:

    That's precisely what I said.. (I didn't want to cover the event horizon - because it's so small and a little confusing - but I can do if you have any questions!)
  • Jul 24, 2008, 03:41 PM
    N0help4u
    I didn't see where you said that stuff that gets too close is swallowed up by the black holes

    This is all I noticed you saying on that point
    They don't suck things in, this is a common misconception - they act exactly like bodies of the same mass which are not black holes. - the gravitational field is not any stronger at the same distance.
  • Jul 24, 2008, 04:00 PM
    Capuchin
    Quote:

    Originally Posted by N0help4u
    I didn't see where you said that stuff that gets too close is swallowed up by the black holes

    This is all I noticed you saying on that point
    They don't suck things in, this is a common misconception - they act exactly like bodies of the same mass which are not black holes. - the gravitational field is not any stronger at the same distance.

    Well it's kind of like saying that things that get too close to the sun are swallowed up by it. It's called a collision. Just that the surface of a black hole is defined in a different way.
  • Jul 24, 2008, 04:03 PM
    N0help4u
    I guess I would understand better if 'safe distance' was defined
  • Jul 24, 2008, 05:33 PM
    DuBas07
    Quote:

    Originally Posted by Capuchin
    There's nothing special about black holes. If the Sun were to be replaced by a black hole of the same mass, we wouldn't notice any difference except for the lack of light! They don't suck things in, this is a common misconception - they act exactly like bodies of the same mass which are not black holes. - the gravitational field is not any stronger at the same distance. Anyway the sun is not massive enough to become a black hole - it will eventually shrink to a white dwarf.

    Is this a recent development of the past year or so? :confused: I need to go reread some books, I seem to have misconstrued some information.

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