Re:Physicists Debate Hawking’s Idea That the Universe Had No...
by pdonis on Thursday June 06, 2019 @05:36PM
(#20119498)
> the limit as time goes to zero
There is no "time" at the "South Pole" point of the universe, or sufficiently close to it. The spacetime geometry in Hawking's model is purely spacelike in that region, not split up into "space" and "time" parts the way it is now. (As I understand the model, the boundary of the "spacelike" region" is at the beginning of inflation.)
> is the south pole still a point contained on earth or is it just a point you can get arbitrarily close to?
There is no "time" at the "South Pole" point of the universe, or sufficiently close to it. The spacetime geometry in Hawking's model is purely spacelike in that region, not split up into "space" and "time" parts the way it is now. (As I understand the model, the boundary of the "spacelike" region" is at the beginning of inflation.)
> is the south pole still a point contained on earth or is it just a point you can get arbitrarily close to?
It's still contained.