Is space-time necessary for a singularity?
A Singularity can only happen if space is tridimensional and not embedded.I provided evidence that the Universe had an extra spatial dimension:Proof of an Extra Spatial Dimension by Marco Pereira on Hypergeometrical Universeand is therefore embedded.I tried to explain that to 3D Beings:Marco Pereira's answer to What would you do if science discovered a two-dimensional world populated by intelligent beings? How would you explain three dimensions to them in a way that they could understand since they have no frame of reference?:)An embedded 3D Universe looks like this:We live in the outermost hypersurface (3D Surface). Here we can see what happens when we look at a type 1A Supernova when the Universe was younger and smaller.Notice that if we revert time and explore the young Universe, it becomes denser, more isotropic and homogeneous. Early Universe was pure Hydrogen.If you just look at the shape (topology), it will be clear that Gravitation played not role in dynamics. The early Universe has extreme density but zero pressure and zero temperature (no degrees of freedom).This means that there was no Singularity (matter didn’t collapse into a point).The reason is more easily understood if you consider that Gravitation is a 3D Force and only moves matter within the hypersurface (it does not effect radial motion). This means that no matter how dense the universe was, the existence of matter in all directions precluded a net force.IN SUMMARYA Singularity only happens in a plain, boundless 3D Spatial Manifold.Since our Universe is a Lightspeed expanding hyperspherical hypersurface, there was never a singularity.This is how the Universe started:Fluctuations of Zero by Marco Pereira on Hypergeometrical Universeand this is how it started moving at the speed of light:Was the Creation of the Universe an Entropic Explosion - An Hyperspherical Prince Rupert’s Drop by Marco Pereira on Hypergeometrical Universe
Space-time singularity can never be observed, so we can't answer its actuality. Space-time singularity can't actually exist because only it is a mathematical artifact. Which of the following statements is true?
Neither. The correct statement is that space-time singularities are features of an incomplete model of reality - General Relativity - which does not take into account quantum mechanics.
Why can a spacetime singularity never exist in physical reality?
Because everything that exist in reality have three spacial dimensions, no more or less. This is what is required to exist in our universe.So a two or one dimension cannot exist. A singularity theoretical has no dimensions, because as soon as you start with even one dimension of a line, it would have to have some depth and width to be able to see it.
Was there an existence of space-time before the Big Bang?
In the context of science, there is simply no way to answer this question. because we cant see back before the big bang.But, if you want my opinion on the matter:The short answer is a causality loop in a parallel dimension of negative space and reverse timeThe long answer is everything,You can look Up Noethers First Theorem, CPT symmetry, loop Quantum Gravity. for some hintsEdit to add: the question had been changed from the existance of space or time. to the existance of space-time.The term for space-time before the Big Bang should be time-space as the two properties should flip-flop before the Big Bang,It would be completely in line with Noethers first theory as well as CPT symmetry.This is highly significant for the properties of the matter/antimatter entangled pairs created at the beginning of time, as they would be moving in opposite directions of time, not space, thus explaining how 2 equal and opposite Universes were created in a dual light cone. However, through entanglement, they would have a shared determinism as if they were two sides of the same coin.The consequences of which would explain all of the remaing mysteries of science in hidden ways. For example the particle wave model would become more like below though we would never know it because once we tried to observe the effect the entanglement would be broken and the particles would no longer exist in a virtual dual orbit as they continued to move off in different directions of time with properties of particles but not waves. Each particle observable by its observer in its own differential universe. Thus explaining the QM properties of spin and magnetic moments.In fact It is one of the key aspects of the Universe that explains everything. Perhaps even all of Philosophy or all of Religion? I wouldn’t know.For example, imagine every one of the quantum effexts of particles in the new context and they would all change from weird to making sense, as would Cosmology, SR and GR. It would take 1/3 of a TOE to fully explain the ramifications of this hudden symmetry (there are two others)Perhaps the most important consequence would be proving that the Universe does not determine our fate nor do we determine the fate of the universe, free will, will determine our fate… whether we choose to believe it or not.IMPORTANT NOTE: THIS IS NOT THE CURRENT ACCEPTED VIEW OF SCIENCE, BUT MY OWN HYPOTHESIS
Does Time stop inside the singularity of a Black Hole?
Not quite, but it reverses places with space, So space/time, time becomes dependant on your location. Here's a PBS Space video that does a really good job, among the most technical channels for science on youtube. Worth watching a couple times https://www.youtube.com/watch?v=KePNhUJ2...
What is the logical basis for assuring that space-time singularities can never exist in nature? Do all physicists think so?
Because of what “ TIME “ actually is…TIME and EXISTENCE" TIME " is just a measurement. It is constant wherever you are. The accuracy of the instrument you use will be influenced by gravity, centrifugal force, heat, and a few other variables. There is no " TIME " dimension. There is no possibility of " TIME TRAVEL ". There is no " SPACE/TIME " effect - plane old gravity works just fine. All that exists, does so in the present " INDIVISIBLE " moment.http://www.creationoftheuniverse... How the process started.http://www.aslodge.com/timehttp://www.aslodge.com/black-holes
Did space, time, matter and energy come into existence at the same time?
Spacetime is a property of matter/energy. Therefore if there is no matter/energy, there can be no Spacetime. Space and time as you commonly know them came into being at the same time as the beginning of the Universe, so even asking if there was 'nothing' before is a misleading question. There was 'nothing', but it was not a pre-existing vast empty void that the Universe expanded into. There was 'nothing' as in 'no void' that existed for 'no time'. Because our brains are hardwired to exist in a world where space and time exist, it can be difficult to understand or accept what this would be like, but the Universe is not required to conform to our expectations.
How can a black holes singularity form?
Zhi Li, my English is just fine. Perhaps I didn't word my question very well. It is kind of difficult to do so when dealing with such things. Perhaps I should have put more effort into it. However don't insult me with such ridiculous comments about my English. I'll just assume that you're in a bad mood. Furthermore I do actually understand that time is relative. You perhaps don't? Of course an observer nearing a black hole will not see itself red-shift nor slow down. What is your point? This doesn't answer my question, because from an outsiders point of view it takes forever for anything to happen inside the black hole. So an observer inside the black hole (if that is even possible) would see the entire universe end before the core has "time" to collapse. We still have a problem here. Sure time is relative, but two frames of reference or not allowed to contradict each other, now are they?
Did time or space exist before the universe was created?
I can see why space wouldn't have existed, but isn't time just an abstract concept. For example, could it be possible that there was absolutely nothing for, say, 10 billion years, before the universe was created? Or would time before the creation of the universe be infinite, since there was never anything before "the time of nothing" to compare it to? I can't stop thinking about things like this. The feeling of trying to wrap my mind around something so abstract is addicting! Is this field as interesting as it seems? Thanks in advance.