(February 13, 2016 at 10:40 am)Alex K Wrote:(February 13, 2016 at 10:36 am)Excited Penguin Wrote: I don't understand. How can it be infinite if it has a starting point from which it expands?
It doesn't have to have that, that's a common misconception. The big bang wasn't an outward explosion that necessarily started in one point. Since relativity breaks down, and inflation likely took place driven by quantum fluctuations, we cannot trace ut back to size zero anyways, and such a singularity likely never occurred.
I still don't get it. Let me put it a little differently. Did the universe have a size, moments after the Big Bang? Does it have a size now? You can't say something is infinite if it has a size, right?