(April 27, 2022 at 4:47 pm)JairCrawford Wrote:(April 27, 2022 at 4:42 pm)HappySkeptic Wrote: It is likely that the amount of matter and kinetic energy is exactly balanced by the amount of negative gravitational potential energy. That is, they add to zero.
So in essence everything is nothing and nothing is everything. Is this at all related to the whole matter/anti-matter thing?
In his undergraduate textbook, Modern Physics (4th edition), Professor Kenneth S. Krane discusses cosmology in his last chapter. In it, he states that the Universe is either finite or infinite in spatial extent. Do you agree? He also states that General Relativity can handle both scenarios, a finite Universe or an infinite one. In either scenario, our Universe is expanding. Of course, if our Universe is infinite, then, it is certainly conceivable that there are events that occurred in our infinite past or will occur in our infinite future, given that the speed of light, the rate of information transfer, is finite.
Now, if our Universe is finite, it is expanding, not only into its future, but in all three spatial directions, hence, its overall volume is increasing over time. What, exactly, do you think, in this scenario, the Universe is expanding "into"?
