- #1
durant35
- 292
- 11
I have a question regarding the process of getting towards equilibrium in our universe. If we imagine a causal patch with our planet at the centre, every planet will redshift away from us an after a while the planet itself will disintegrate, let's call this process the decay of Earth. Eventually after all particles move out this causal patch what is left will be empty space - the maximum entropy state.
However let's imagine a causal patch/observable universe which has a black hole in its center, Black holes take longer to 'decay' than planets or stars due to slow evaporation. After the particles move away from this causal patch there will be nothing left but empty space. If we compare this process of 'emptying out' in the black hole's causal patch with Earth's causal patch presumably Earth will 'decay' much faster than the black hole, so the equilibration in causal patch of the Earth will be much faster than equilibration in causal patch of the black hole.
To sum up, is it legit to say that different parts of the universe equilibrate (or asymptote towards empty space) at different rates depending on the matter content inside them? If we look globally, the process of emptying out isn't something that happens at the same rate?
This thought has come up to my mind while reading the wikipedia article: https://en.wikipedia.org/wiki/Future_of_an_expanding_universe
where it is clearly stated that the 'Black hole era' will happen much later than the dinsintegration of planets.
If this is valid, is it correct to conclude that our observable universe will empty out much faster than let's say an observable universe of a black hole ?
Thanks in advance
However let's imagine a causal patch/observable universe which has a black hole in its center, Black holes take longer to 'decay' than planets or stars due to slow evaporation. After the particles move away from this causal patch there will be nothing left but empty space. If we compare this process of 'emptying out' in the black hole's causal patch with Earth's causal patch presumably Earth will 'decay' much faster than the black hole, so the equilibration in causal patch of the Earth will be much faster than equilibration in causal patch of the black hole.
To sum up, is it legit to say that different parts of the universe equilibrate (or asymptote towards empty space) at different rates depending on the matter content inside them? If we look globally, the process of emptying out isn't something that happens at the same rate?
This thought has come up to my mind while reading the wikipedia article: https://en.wikipedia.org/wiki/Future_of_an_expanding_universe
where it is clearly stated that the 'Black hole era' will happen much later than the dinsintegration of planets.
If this is valid, is it correct to conclude that our observable universe will empty out much faster than let's say an observable universe of a black hole ?
Thanks in advance