I’ve often thought that maybe the universe didn’t start with an event within the singularity, but was effectively sucked apart by external forces.
I could envisage the entire universe contained within a hollow spherical shell, and at the beginning of time as we know it, all the matter was suspended at the centre of this outer sphere, forming the singularity.
How and why was it held at the centre?
Well, consider the sphere as being electrically charged - positive on the outside and negative on the inside. On the inside were loose particles, also negatively charged (maybe they were once part of the inside of the sphere and broke away). Now, having the same charge as the inside of the sphere, they would be repelled from it and would congregate at the centre of the sphere, assuming the force exerted by the sphere was of sufficient magnitude to overcome the tendency of each particle to repel its neighbour due to their similar polarity.
So there we are, with everything in equilibrium, when something changes; not an explosion within the singularity, but something at the outer sphere.
What if the sphere changed polarity, in the same way that the earth’s magnetic field reverses, every so many thousand years. Now the force holding the particles is reversed and the outer shell attracts the particles, rather than holding them in place, and the particles accelerate away from one another, attracted by the now opposite polarity of the inner shell.
Alternatively, the outer sphere may have been destroyed (by person, or persons unknown) and they flew apart, due to their similar polarity.
Now, the force involved may not have been electrical; the same result would occur if magnetism, or gravity & anti-gravity were responsible, or perhaps some greater, as yet undiscovered force.
Maybe the inside of a hollow sphere is where lies the other side of space time. The classic visualisation of gravity (space time curved by matter) being a blanket, depressed in the middle by a cannon ball and attracting a billiard ball rolled across its surface – this blanket has a protruding underside, which would repel the billiard ball – is this the anti-gravity which sat inside our sphere and was removed, or reversed at the beginning of time? Maybe anti-gravity is more likely than an electrical charge scenario, as there would be no tendency for the particles to repel one another.
I’ve lost track of whether the current thinking is that expansion of the universe is accelerating, or decelerating, but whichever it is would determine whether the outer sphere was still there, acting with a greater force the closer we get (accelerating), or it has been destroyed and the momentum came only from the initial repulsion of the individual particles, which would diminish over time (decelerating).
I recently became aware that current thinking is that there is a bubble around our entire universe and that there may be more than one such bubble. It therefore follows that our bubble could have been altered by interaction with, or action by, any of the other bubbles, possibly explaining the initial change to our sphere/bubble.
Suddenly it all appears feasible…..