Quote:
Originally Posted by sirjon
Our universe began from a point of singularity w/ infinite density, according to Penrose theorem.There is also this consensus that majority of the experts, supported the theory that what occurred was a huge split-second inflation of the universe, followed by gradual expansion that continues this day and now accelerating. But I cannot visualize what entity it is (that is, the idea of a point of singularity) , increadibly small (smaller than a point of a needle?) but w/very enormous density? Seems self-contradicting.
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First off "point of singularity" does not make sense to me. A singularity is just a point in equation where there is no answer. What we believe is that our observable universe gets more dense the further we travel back in time. At some point very near the T0 the fundamental forces start unifying and there is not an issue with stuff being to close together.
If the universe is infinite and open then near T0 the "size" of the universe is still infinite. It would just be much more dense. Again our observable universe might have been able to fit in a very small point but at that point there was no Hadron or other fundamental particles that restricted them from occupying the same space and time.
Think of it this way. How many photons can you fit in the same location?
Or even better...don't think of it as just higher density but better said an average area would have a higher "energy density" as you approach T
0.