RE: What Does Gravity Have To Do WithThe Expanding Universe?
February 24, 2018 at 6:23 am
(This post was last modified: February 24, 2018 at 7:00 am by Banned.)
(February 23, 2018 at 9:08 pm)polymath257 Wrote:(February 23, 2018 at 8:09 pm)Banned Wrote: If space extends beyond the universe, into which it is supposed to be expanding, then it must have caused that space in the first instance, or even while it is currently expanding.
Once again, you have an image of some boundary expanding outwards. That is NOT what the BB model says. There is no 'beyond the universe' spatially. Instead, wherever you are, the basic 'look and feel' is the same: galaxies in all directions.
The universe isn't 'expanding into' some space beyond the universe (even in models where space is finite). Instead, the distances between galaxies *within* the universe are getting larger over time.
In a technical sense, the universe is literally expanding into the future, not into more space.
The relation between space and time that you've bought to view rings true.
You explain things well.
So if the universe is expanding into the future - do you think this feature gives space an apparent infinity?
(February 24, 2018 at 1:39 am)Anomalocaris Wrote: ...We can not really exclude the possibility that the universe may be nonhomogenous in this way. However, we are pretty sure if it is nonhomogenous this way, then the region of the universe that resembles our familiar region is likely to be much larger than the observable part of the universe.
I think that the universe is heterogeneous in its space time properties, which the variety of space time curves seem to indicate. Partly because energy is typically expressed by a distribution of highs and lows, whether in wave or spacial form.
Do you think that if the universe has an edge, that it may be impossible to reach that point, because it has properties which cannot be perceived or experienced by anything that "resembles our familiar region." ?
