People slipping through time.

Discussion in 'General Science & Technology' started by GaiaGirl95, Jan 21, 2014.

  1. paddoboy Valued Senior Member

    Messages:
    27,543
    Nice to discuss something logically with someone as logical as yourself Write4U.

    Kerr type BH's are BH's that spin.
    Theoretically most BH's should be of this type, as the original star from whence the BH came from, would have had angular momentum.
    Generally though for ease of calculations and maths etc, when we discuss BH's, we discuss the simple garden Schwarzchild variety.
    A spinning BH, or Kerr type BH would also have at its center not an actual Singularity as is common knowledge, but a ring of rotating neutrons, prevented from collapsing to Singularity status by centrifugal force.
    It has been theorised that if we could enter such a BH from its axis of rotation region, and adjust our entry into such a BH so as to neatly pass through this ring of neutrons, the effects of gravity would be equal from all sides, and we maybe able to pass through unharmed and intact.
    What we would pass into is the big question.

    http://www.strangerdimensions.com/2012/07/17/could-a-kerr-black-hole-be-used-to-travel-through-time/


    or this......
    http://www.math.ucla.edu/~bon/kerroview.html

    Where it says in part......
    "If we dare to penetrate the horizon of this Kerr black hole we will find ... another horizon. Behind this, the singularity in spacetime now appears, not as a central focus, but as a ring-- a circle of infinite gravitational forces. Fortunately, this ring singularity is not quite as dangerous as the Schwarzschild one--it is possible to avoid it and enter a new region of spacetime, by passing through either of two "throats" bounded by the ring (see The Big Picture)".

    In the new region, escape from the ring singularity is easy because the gravitational effect of the black hole is reversed--it now repels rather than attracts. As distance increases, this negative gravity weakens, just as on the positive side, until its effect becomes negligible.

    A quick departure may be prudent, but will prevent discovery of something strange: the ring singularity is the outer equator of a spatial solid torus that is, quite simply, a time machine.. Travelling within it, one can reach arbitrarily far back into the past of any entity inside the double horizons. In principle you can arrange a bridge game, with all four players being you yourself, at different ages. But there is no way to meet Julius Caesar or your (predeparture) childhood self since these lie on the other side of two impassable horizons.
     
    Last edited: Oct 31, 2014
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  3. paddoboy Valued Senior Member

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    Here's a more simplified explanation from WIKI.....
    http://en.wikipedia.org/wiki/Ring_singularity

    Where in part it says.....

    "Description of a ring singularity[edit]
    When a spherical non-rotating body of a critical radius collapses under its own gravitation under general relativity, theory suggests it will collapse to a single point. This is not the case with a rotating black hole (a Kerr black hole). With a fluid rotating body, its distribution of mass is not spherical (it shows anequatorial bulge), and it has angular momentum. Since a point cannot support rotation or angular momentum in classical physics (general relativity being a classical theory), the minimal shape of the singularity that can support these properties is instead a ring with zero thickness but non-zero radius, and this is referred to as a ring singularity or Kerr singularity.

    Due to a rotating hole's rotational frame-dragging effects, spacetime in the vicinity of the ring will undergo curvature in the direction of the ring's motion. Effectively this means that different observers placed around a Kerr black hole who are asked to point to the hole's apparent center of gravity may point to different points on the ring. Falling objects will begin to acquire angular momentum from the ring before they actually strike it, and the path taken by a perpendicular light ray (initially traveling toward the ring's center) will curve in the direction of ring motion before intersecting with the ring.

    Traversability and nakedness[edit]
    An observer crossing the event horizon of a non-rotating (Schwarzschild) black hole cannot avoid the central singularity, which lies in the future world line of everything within the horizon. Thus one cannot avoid spaghettification by the tidal forces of the central singularity.

    This is not necessarily true with a Kerr black hole. An observer falling into a Kerr black hole may be able to avoid the central singularity by making clever use of the inner event horizon associated with this class of black hole. This makes it possible for the Kerr black hole to act as a sort of wormhole, possibly even a traversable wormhole.[2]"
     
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