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Space Science

Black Holes 'Do Not Exist,' Contends Physicist 759

SpaceAdmiral writes "Nature reports that, according to a physicist at the Lawrence Livermore National Laboratory in California, 'It's a near certainty that black holes don't exist.' George Chapline argues that the collapse of massive stars is more likely to lead to dark energy stars. These dark energy stars behave somewhat like a black hole outside of the surface, but the negative gravity inside could cause matter to 'bounce back out again.'"
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Black Holes 'Do Not Exist,' Contends Physicist

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  • The actual article (Score:5, Informative)

    by the_mighty_$ ( 726261 ) on Monday April 04, 2005 @09:05AM (#12132775)
    Here [arxiv.org] is his actual article (PDF).
    • (Note: the file does not end in .pdf, so you have to manually open it from within Acrobat Reader)
    • From the paper's summary:

      Event horizons and closed time-like curves cannot exist in the real world for the simple reason that they are inconsistent with quantum mechanics.

      And photons do not exist because they contradict the double-slit experiment? Give me a break. It doesn't make sense to proclaim that something does not exist because it contradicts an established theory, especially if there is quite a bit of evidence that it's actually there. It's the other way round: If such a thing exists, the the
    • by jd ( 1658 )
      ...is that the Professor who had the bet with Hawking over Black Holes has to give his year's subscription to Penthouse back.
  • Dark energy question (Score:3, Interesting)

    by ardor ( 673957 ) on Monday April 04, 2005 @09:06AM (#12132782)
    Is dark energy "negative" energy? If so, if one could find a way how to get dark energy, the alcubierre drive could become a reality in the far future? I know that it need heaps of negative energy, but afaik someone corrected the calculations, resulting in much less energy consumption.
  • by sandstorming ( 850026 ) <<moc.gnimrotsdnas> <ta> <eesnhoj>> on Monday April 04, 2005 @09:07AM (#12132789)
    Theres always someone who has a diferent theory.

    On the other hand though...
    Tell someone there are a million stars in the sky and they'll believe you...
    Tell them paint is wet and...
  • by Anonymous Coward on Monday April 04, 2005 @09:09AM (#12132809)
    But quantum mechanics, which describes physical phenomena at infinitesimally small scales, is meaningful only if time is universal; if not, its equations make no sense.
    That's just simply untrue. There is an enormous amount of work that makes Quantum Mechanics play well with relativity.
    • by the_mighty_$ ( 726261 ) on Monday April 04, 2005 @09:34AM (#12133019)
      There is an enormous amount of work that makes Quantum Mechanics play well with relativity.

      The problem with quantum mechanics and relativity is that the theory of quantum mechanics only works well when gravity is so weak that it can be neglected. Particle theory only works when we pretend gravity doesn't exist. On the other hand, general relativity only works when we pretend that the Universe is purely classical and that quantum mechanics is not needed in our description of nature.

      The solution is string theory. This [superstringtheory.com] website has a nice list of expirements that have been done in favor of string theory.
      • You should have said that possibly a more accurate solution is string theory. Current models of string theory require a background space in which the string moves. As another poster to your article mentioned, there are other theories that also cover some of the gaps in quantum mechanics. Loop gravity, for example, apparently has the opposite problem. You get a background space and some idea of how things move in the space, but the dynamics are lacking.

        Incidentally, the page you cite contains no references


      • The solution is string theory. This [superstringtheory.com] website has a nice list of expirements that have been done in favor of string theory.

        String theory may or may "be the solution". But let's not kid ourselves; there have been *no* experiments done that support string theory. The site linked is just playing "let's pretend".

  • by jayhawk88 ( 160512 ) <jayhawk88@gmail.com> on Monday April 04, 2005 @09:13AM (#12132846)
    You know MC Hawking isn't going to stand for this shit.
  • picture (Score:5, Funny)

    by elgatozorbas ( 783538 ) on Monday April 04, 2005 @09:17AM (#12132864)
    These dark energy stars behave somewhat like a blackhole outside of the surface

    Apparently they look something like this [humlak.cz]

  • Good one (Score:5, Insightful)

    by Anonymous Coward on Monday April 04, 2005 @09:17AM (#12132868)
    In other news, donuts almost certainly don't exist. Instead it is much more likely that there exists circular pieces of cooked dough with a hole in the centre.
  • Theory tug of war (Score:5, Interesting)

    by selectspec ( 74651 ) on Monday April 04, 2005 @09:17AM (#12132869)
    This idea that "singularities" don't really exist has been around for a few years now. The idea is that a very small bubble forms that is unable to compress into a singularity because of the "dark energy" concept of reverse-gravity. However, the new theories that "dark energy" really doesn't exist, and that the expansion of the universe can be explained by the negative higgs field + spacetime ripples of the early inflation of the universe run contrary to this "no black hole" concept.
  • by cuerty ( 671497 ) on Monday April 04, 2005 @09:21AM (#12132910)
  • by CompWerks ( 684874 ) on Monday April 04, 2005 @09:22AM (#12132918)
    You've got to be kidding, It's way to early for this.

  • by MajorDick ( 735308 ) on Monday April 04, 2005 @09:23AM (#12132921)
    I mean , I have never felt "confortable" with the theory of black holes, it seems somewhat anthemic to true science, kind of like phlogiston
    • by Mant ( 578427 ) on Monday April 04, 2005 @09:44AM (#12133117) Homepage

      What is "true science?". Science is a process, not a result. Things that turned out to be wrong, like phlogiston or ether, aren't necessarily bad science, they are still part of the process.

      They were disproved, and lead to better (as in having more accurate predictive power) theories. Black Holes are extrapolations of existing theories that seem good (like General Relativity), so they shouldn't be dismissed unless we can disprove them or come up with a better theory.

      That, after all, is science.

  • Dark energy stars? (Score:5, Interesting)

    by TrekkieGod ( 627867 ) on Monday April 04, 2005 @09:24AM (#12132935) Homepage Journal
    From the article:

    Over the past few years, observations of the motions of galaxies have shown that some 70% the Universe seems to be composed of a strange 'dark energy' that is driving the Universe's accelerating expansion

    Ah, but I at least one theory exists that says dark energy isn't really needed. [slashdot.org]

    Not there's anything wrong with having different theories, we'll let observational data sort it out later. Could a physicist around here explain how these proposed dark energy stars could explain the expansion of the universe if they behave exactly like black holes outside the event horizon?

  • by Artifakt ( 700173 ) on Monday April 04, 2005 @09:26AM (#12132947)
    The researcher is claiming that his theory accounts for both dark matter and dark energy, as well as some observations like x-ray bursts from the cores of active galaxies.
    Conventional theory doesn't tie dark matter to dark energy at all. If the popularizations hadn't used the word dark in both cases, the two concepts would easily be completely unrelated.
    Several candidates for dark matter are very conventional forms of matter, such as neutrinos or even plain old neutronium, which don't need an exotic explanation. Others involve particles we have produced in accelerators or theorize on the basis of data we have obtained ever since the 1940's.
    Dark Energy, o.t.o.h., is something very different. The evidence for it is all very recent, and the theories proposed are all well outside the standard model for Cosmology.
    Thinking we even need a single theory to explain both only makes sense if you can first disprove the more conventional explanations for dark matter.
  • by scorp1us ( 235526 ) on Monday April 04, 2005 @09:27AM (#12132958) Journal
    If the event horizon is a function of gravity, shouldn't it be easy to escape a black hole using a magetic drive? Last I checked magnatism was orders of magnitude stronger than gravity. This means there are 2 event horizons, one for gravity and the other for magnetism. It should be possible to escape a black hole up to the point of the magnetic event horizon. (I assume the black hole generates a magnetic field. If not then, using mag drives should allow one to navigate freely.)

    Just a thought...
    • by Tango42 ( 662363 ) on Monday April 04, 2005 @09:38AM (#12133050)
      No. The event horizon is the distance at which the escape velocity is the speed of light - you can't travel at the speed of light, so it's impossible to escape. (That's something of a simplification, but it will do) I suppose you could have an electric version of a black hole (not magnetic though, it would have to be a magnetic monopole [magnet with only one pole, rather than the usual north and south poles] which are thought not to exist). An object with sufficent charge that no charge object could escape it. Neutral opjects would still be able to leave, of course, and the event horizon would be different depending on the charge of the object trying to leave...
      • Wouldn't work. (Score:4, Insightful)

        by Rufus88 ( 748752 ) on Monday April 04, 2005 @10:13AM (#12133403)
        I suppose you could have an electric version of a black hole

        Not likely, and even if so, not for very long. What would hold this enormous amount of like-charged particles together? (Note: the electromagnetic force is way stronger than gravity.) But even if you had the electric equivalent of a black hole, it wouldn't last very long, because it would only attract oppositely charged particles, and they would reduce the net charge on the "hole".

        Put another way, charge aggregation is a negative feedback loop, whereas mass aggregation is a positive feedback loop.
    • I think the difference is that magnetism doesn't warp space-time like gravity does. My crude understanding of black holes is that at the event horizon, space-time ceases to exist, so there would be no where for the magnetic field to propagate. Quantum forces like magnetism need a space to work in, and black holes have no space at all by definition.

      I'm sure someone who's actually had a relativity class can explain it better than I can, but I think I'm on the right track at least.

    • by MustardMan ( 52102 ) on Monday April 04, 2005 @09:51AM (#12133180)
      You're making a very dangerous generalized assumption there. Both forces go like 1/r^2. Both forces get multiplied by something to determine its strength. In normal lab conditions, you aren't going to be able to gather enough mass to exceed the magnetic fields we are able to create. However, it's much harder to create a magnetic field that can, say, carry enough force to make the moon orbit the earth. Remember, to form a magnetic field you need a huge number of charges moving roughly in unison. To form a gravitational field you just need a big hunk of matter. With a black hole, you're talking quite a lot of mass, and it would be very difficult for a man-made device to move enough charge to create a field anywhere close to the magnitude of a black hole.

      Plus, say you can create a strong enough magnetic field. What are you going to push/pull against? Some star out in the middle of nowhere? It probably doesn't have a strong enough magnetic field of its own? The black hole itself? Now you're getting into all kinds of other problems.

      One final thing to note about your idea - gravity affects electromagnetic radiation, and hence it's affecting magnetic fields. Ever heard of gravitational lensing? Ever heard the statement that the event horizon is the point after which "even light can't excape"? It's not as simple as trying to create a bigger force, as the gravity of the black hole itself would be distorting the magnetic field you are trying to create.
  • What next? (Score:5, Funny)

    by untaken_name ( 660789 ) on Monday April 04, 2005 @09:32AM (#12132995) Homepage
    You going to tell me that Terra isn't flat? That the humours don't control disease? That there are no dragons off the edge of the map? Puh-leeze.

    This is why I make it a point to never listen to scientists. They change their minds too often. You'd think women would dominate science, considering their natural talents in that area.
  • by Tango42 ( 662363 ) on Monday April 04, 2005 @09:41AM (#12133072)
    He says that electron-positron anihilation could account for the radiation observed at the center of the galaxy. The radiation produced when an electron collides with a positron is of a very specific wavelength - I think someone would have noticed if the radiation at the centre of the galaxy was at that wavelength, rather than a distribution of wavelengths in the way you would expect from a very hot object (superheated plasma in this case).
    • I think someone would have noticed if the radiation at the centre of the galaxy was at that wavelength, rather than a distribution of wavelengths in the way you would expect from a very hot object

      But couldn't that distribution be due to secondary radiation from gas heated to plasma by the radiation from the +/- anihilation? There's a lot of gas between here and the galactic core.

      TWW

  • by Muad'Dave ( 255648 ) on Monday April 04, 2005 @10:01AM (#12133286) Homepage

    One thing that is wrong with black holes vis a vie quantum mechanics...

    Such a silly mistake from a Real Scientist(tm). Vis-a-vis, perhaps?

    Tiller's Rule: NEVER use a word that you've only heard and never read. You WILL look like a fool.

  • by Jump ( 135604 ) on Monday April 04, 2005 @10:05AM (#12133317)
    So the matter is repelled at the horizon when matter falls apart, thus the black hole cannot swallow the mass of the collapsing star? How does he get a horizon then firsthand? Without a collapse he cannot have this effect. When there is a horizon and he is right with his claims, this would only mean once formed a black hole would not grow. However, the existence of Sgr A* already proofs this is wrong, because there are no stars with 4 10^6 solar masses to form it in a collapse. It needs to be grown out of accreted material (which he claims is impossible). He also doesn't explain how the negative energy can collapse (and where it comes from). So he replaces one problem with another one.
  • by RmanB17499 ( 829438 ) on Monday April 04, 2005 @10:34AM (#12133606)
    Whenever, over the ages, science seems to get too complicated, the usual answer is that it has gone off in a tangent. Most of the best theories have been elegantly simple at explaining our observations. These "discoveries" when proposed were considered revolutionary ideas. Later, when they were developed they usually were over-complicated by trying to explain everything. That's when a revolution in simplification happened and the process began from nearly scratch. Think of what happened to Keplerians' formulas and Newton's idea of gravity. They are still used today, even though they are wrong, and have been supplanted by Einstein's Theory of Gravity, because the models of Newton & Kepler are very accurate. Better yet: look at the models offered by geo-centric solar system projections. Here is one really nice animation: http://catholicoutlook.com/images/movingsolar7.gif [catholicoutlook.com] The idea is that once it gets too complicated all of the evolutionary ideas that get developed are probably causing more harm to the original thesis. Although the original work did a great job of explaining a certain observation when new data was added the theory had to expanded to a level of undue complexity to have weight. Then a competing and revolutionary idea was developed, seemed to match the data, and the process began anew. I guess it's getting time for a powerful new theory. One that will get ruined in the future, since we really know so little.
  • Black holes (Score:3, Funny)

    by xXunderdogXx ( 315464 ) on Monday April 04, 2005 @11:03AM (#12133873) Homepage Journal
    We know of at least one black hole whose existence has been repeatedly verified by unsuspecting eyes: Goatse.
  • by scharkalvin ( 72228 ) on Monday April 04, 2005 @12:23PM (#12134622) Homepage
    I'd like to hear what S. Hawking has to say about this one.
  • Negative gravity (Score:3, Interesting)

    by Orion Blastar ( 457579 ) <orionblastar AT gmail DOT com> on Monday April 04, 2005 @12:35PM (#12134730) Homepage Journal
    might be just the thing needed to warp space in such a way to create a worm hole. Before now, we never thought that could be possible. It opens up possibilities to such things as time travel, and space travel through the wormhole.

    That is, if this theory is true.
  • What it all means (Score:4, Insightful)

    by radtea ( 464814 ) on Monday April 04, 2005 @12:50PM (#12134897)
    The problem with black holes is that they are, by definition, singularities. Unadulterated GR says that matter becomes infinitely dense, that the event horizon is infinitely sharp, etc.

    This isn't very satisfactory, and we've known for a long time that something interesting must happen to smooth out these infinities at the Planck scale (something to the tune of 10^-33 cm). In this limited sense, we've known all along that "strict" black holes don't exist: that is, the pure, mathematical singularities that GR predicts must be smoothed out by quantum effects at very short scales.

    In keeping with the sloppy thinking that makes physics the Queen of the Sciences (IAAP, as it happens) we've decided that those Planck-scale effects don't really count, and implicitly modified our concept of "Black Hole" to accomodate them.

    What this guy is playing with is the idea that something interesting happens on much larger scales. In this case, although there is still something like an event horizon, it is no longer a singularity in the space-time co-ordinates of distant observers, but rather a phase transition in the quantum-mechanical vaccuum. He is proposing a macroscopic quantum mechanism for smoothing out the singularity.

    This is a nice move for two reasons: the study of quantum critical behavior has a variety of analogues such as superfluids that can be studied in the lab; and there are physical phenomena that he predicts which may explain a variety of otherwise problematic observations. These are: high-energy positrons from the centre of our galaxy (where there is a 10^6 solar mass dense object); gamma-ray bursts; cosmological dark matter.

    Overall, this is a nice, plausible, interesting approach to a serious problem.

    --Tom

The Tao is like a glob pattern: used but never used up. It is like the extern void: filled with infinite possibilities.

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