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What is a singularity

  1. Jan 28, 2016 #1

    wolram

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    Gold Member

    https://en.wikipedia.org/wiki/Gravitational_singularity

    The two most important types of spacetime singularities are curvature singularities and conical singularities.[4] Singularities can also be divided according to whether or not they are covered by an event horizon (naked singularities are not covered).[5] According to modern general relativity, the initial state of the universe, at the beginning of the Big Bang, was a singularity.[6] Both general relativityand quantum mechanics break down in describing the earliest moments of the Big Bang,[7] but in general, quantum mechanics does not permit particles to inhabit a space smaller than their wavelengths.[8] Another type of singularity predicted by general relativity is inside a black hole: any star collapsing beyond a certain point (the Schwarzschild radius) would form a black hole, inside which a singularity (covered by an event horizon) would be formed, as all the matter would flow into a certain point (or a circular line, if the black hole is rotating).[9] This is again according to general relativity without quantum mechanics, which forbids wavelike particles entering a space smaller than their wavelength. These hypothetical singularities are also known as curvature singularities.

    What are the singularities inside Black Holes, are they physical or purely mathematical, i think AFAICR
    That the main consensus is that the universe did not start from a singularity, so that leaves Black Holes
    as the last bastion for a possible physical thing inside an event horizon, if it is not physical what has hapend
    to the millions of sun masses consumed by the Black Hole ?
     
  2. jcsd
  3. Jan 28, 2016 #2

    Drakkith

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    Staff: Mentor

    No one knows.

    No one knows for sure. It's possible it is compressed into an even more dense form than it is in a neutron star.
     
  4. Jan 28, 2016 #3

    martinbn

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