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Thread: What's inside a blackhole?

  1. #1 What's inside a blackhole? 
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    I think this is a silly question to ask, because when you think about it a black-hole is an enormous amount of mass compressed to a small size, s all you have to do is imagine yourself being sucked into a 3D hole that has ripped apart your body before you can hit it. If you do manage to reach the black-holes surface(which I believe is impossible without dying) then you are guaranteed to be sucked in anyway and your atoms will be pulled apart. I don't know how it would feel, but if you can imagine what pain you'll be going through please explain.


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    Brassica oleracea Strange's Avatar
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    Quote Originally Posted by frumpydolphin View Post
    If you do manage to reach the black-holes surface(which I believe is impossible without dying) then you are guaranteed to be sucked in anyway and your atoms will be pulled apart.
    If by "surface" you mean the event horizon, then for a reasonably large black hole, the tidal forces would be quite small and you would fall through without noticing anything special.


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    No. because large black-holes still have, well, massive mass, so the gravity would still rip whichever part of you that's closer to the black-hole more than the part that's further, death still comes
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    Quote Originally Posted by frumpydolphin View Post
    No. because large black-holes still have, well, massive mass, so the gravity would still rip whichever part of you that's closer to the black-hole more than the part that's further, death still comes
    Strange is referring to the event horizon. In a large enough Black Hole, the tidal force is low enough for you to pass the event horizon unharmed. You won't experience spaghettification until you're closer to the singularity.
    Its the way nature is!
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    Well all the same then once at the singularity you would die, and your speed would likely be great because of the massive energy so it would be like falling down a hole then hitting a bottom that tears you up dramatically. I think all the ideas about new universe stuff is still fairly silly though.
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  7. #6  
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    is it not that all ideas conjectures about what is inside a black hole fall outside of science ? if the inside of a black hole is not in our universe it is like the discussion of what happened before big bang theory. we can not know the universe at the moment of the big bang. only some infitesimal time period after the big bang. so it is with black holes ?
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    Quote Originally Posted by Chucknorium View Post
    is it not that all ideas conjectures about what is inside a black hole fall outside of science ?
    Not really. We have no reason to think that general relativity doesn't continue to describe space-time inside the event horizon; mathematically nothing "happens" at the event horizon that says, "your theory doesn't really work any more". On the other hand, we do know that GR breaks down when you get to the central singularity (that is why it is a singularity).
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    yes, i understand difference between event horizon and singularity. but is it not like some quantum mechanics physicists where they say if you can never know something then that something does not really exist for us ? here, on the outside of the event horizon of black hole, we can send a ship inside but the info it learns can never be returned to us ?
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  10. #9  
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    Quote Originally Posted by Chucknorium View Post
    yes, i understand difference between event horizon and singularity. but is it not like some quantum mechanics physicists where they say if you can never know something then that something does not really exist for us ?
    We can never test (directly) observations inside a black hole, true. I'm not sure that puts it outside of science. Just outside of experimental science. And if Hawking's latest speculations turned out to be correct (or some other attempts at quantum gravity) then maybe we can observe what is inside a black hole...
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    i have tried to read 2 of hawkings books. i admit to getting lost after about 3 or 4 chapters. but he is still an admirable man.
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    i have also read where some physicists conjecture that any information that passes the event horizon that this information is not lost and all information contained in a black hole can be re-acquired at a later date. of course i do not understand this.
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    Quote Originally Posted by Chucknorium View Post
    i have tried to read 2 of hawkings books. i admit to getting lost after about 3 or 4 chapters. but he is still an admirable man.
    If you find his pop-sci hard, you should try and read his technical publications, such as Hawking/Ellis "The Large Scale Structure of Space-Time"
    Not only is the man an outstanding physicist, but he is also a brilliant mathematician in his own right. He's the kind of scientist who is truly unique in his generation.
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    Now that we've agreed you can survive the event horizon I have another weird idea- If the universe started from a black hole, now don't say I'm a hypocrite yet, if, once there's a big enough black hole to take in the universes mass, and does so, then there would be only the black hole left. Because of the insane amounts of mass in this titanic black hole fusion would go on releasing insane amounts of energy, and because there is so much matter being fused, the black hole would blast apart(because of so much fusion energy) and send its matter flying away. This could be a reset for the universe, every time this happens the next "universe considers this their big bang.
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  15. #14  
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    Quote Originally Posted by Chucknorium View Post
    is it not that all ideas conjectures about what is inside a black hole fall outside of science ? if the inside of a black hole is not in our universe it is like the discussion of what happened before big bang theory. we can not know the universe at the moment of the big bang. only some infitesimal time period after the big bang. so it is with black holes ?
    ....I think this couldn't be true, because if the black hole is not in our universe, then it would be unlikely we feel its gravity, and it probably wouldn't be able to move in this universe.
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    If someone could observe the universe before the formation of stars, he might not have guessed that when the apparently inert hydrogen gas floating around was compressed, dramatically new properties would emerge from this configuration of the exact same thing.

    Therefore it is possible that the inside of a black hole is sufficiently different as an environment to cause new properties we have not observed anywhere in the universe, unfortunately since we cant touch, smell or hear things outside our solar system, and that the electromagnetic energy we use to observe the universe is trapped in the black hole, we cant observe what these hypothetical/potential properties are.
    Last edited by icewendigo; March 27th, 2014 at 08:14 AM.
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    Forum Radioactive Isotope cosmictraveler's Avatar
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    What interests me most is just how a black hole forms and why.
    Last edited by cosmictraveler; March 27th, 2014 at 08:31 AM.
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  18. #17  
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    Btw since you can have a black hole orbiting a star, can we say that the matter/energy inside is affected by the neaby star's gravity, could this external gravity be measured(assuming it was possible to measure it)? Or if our universe was inside a larger universe could we detect a gravitational effect originating from outside the universe?

    Btw on a side note question, if there were no stars and no galaxies outside the milky way, would we know our galaxy is spinning?
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    Quote Originally Posted by cosmictraveler View Post
    What interests me most is just how a black hole forms and why.
    Stellar mass black holes are formed from the collapse of the matter left after a supernova. It is less clear how supermassive black holes form. Possible from the merging of multiple black holes and accreting lots of other matter.

    HubbleSite: Black Holes: Gravity's Relentless Pull interactive: Encyclopedia
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  20. #19  
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    Quote Originally Posted by icewendigo View Post
    Btw on a side note question, if there were no stars and no galaxies outside the milky way, would we know our galaxy is spinning?
    Yes, the orbital speed of individual stars and the surrounding hydrogen can be directly measured.

    Milky Way Galaxy
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    So what is of my question asked earlier, could the "next universe's" (couldn't think of better way to phrase it) Big Bang be cause be immense stored energy in a black hole?
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  22. #21  
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    Quote Originally Posted by icewendigo View Post
    If someone could observe the universe before the formation of stars, he might not have guessed that when the apparently inert hydrogen gas floating around was compressed, dramatically new properties would emerge from this configuration of the exact same thing.

    Therefore it is possible that the inside of a black hole is sufficiently different as an environment to cause new properties we have not observed anywhere in the universe, unfortunately since we cant touch, smell or hear things outside our solar system, and that the electromagnetic energy we use to observe the universe is trapped in the black hole, we cant observe what these hypothetical/potential properties are.
    Are we sure the universe started with Hydrogen atoms?
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