RE: Brace yourselves for gravitational waves
February 13, 2016 at 10:40 am
(This post was last modified: February 13, 2016 at 10:41 am by Alex K.)
(February 13, 2016 at 10:36 am)Excited Penguin Wrote:(February 13, 2016 at 10:34 am)Alex K Wrote: There is a well defined notion of the spatial extent of the universe, and it is either finite or not. It could however be finite in one direction and infinite in another...
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.
The fool hath said in his heart, There is a God. They are corrupt, they have done abominable works, there is none that doeth good.
Psalm 14, KJV revised edition
