[ExI] (no subject)

[Gadersd]

> Is it possible to explain to a physics deficient person how celestial bodies can accelerate?  What gives them motion other than the Big Bang?

Space itself is expanding between celestial bodies. The more space between bodies, the greater the rate of expansion. Think of it like exponential growth in biology. Space replicates and the more space there is the more replication occurs.

> On Jun 18, 2023, at 10:27 AM, William Flynn Wallace via extropy-chat <extropy-chat at lists.extropy.org> wrote:
> 
> Is it possible to explain to a physics deficient person how celestial bodies can accelerate?  What gives them motion other than the Big Bang?   bill w
> 
> On Sun, Jun 18, 2023 at 9:03 AM Gadersd via extropy-chat <extropy-chat at lists.extropy.org <mailto:extropy-chat at lists.extropy.org>> wrote:
>> Is there not sufficiently little data on how universes work that the assumption of an inevitable heat death is essentially speculation at this time?  Speculation with some evidence, but much less thoroughly proven than most things we take as absolutes.
> 
> The universe is expanding and the expansion accelerates. There is a distance at which the expansion exceeds the speed of light at which point two objects will never come into contact again, barring some speculative wormhole wizardry. Most matter will then eventually be inaccessible to us and we will find ourselves isolated within islands of matter. Any finite system held within a particular volume of space will eventually become cyclic, at least in distribution. There is no real immortality in such a state since the distant future is the distant past. Any growth or experience is eventually reset and novelty is neutered.
> 
> The common viewpoint among physicists is that such a confined system converges to a uniform distribution of matter states such that any configuration is equally likely. This is a Boltzmann brain scenario. There is no structure to the experience of a Boltzmann brain as the probability of all experiences are equally likely. This is a state of maximum entropy with respect to experience. This is true death.
> 
> More likely, the density of space will decrease as matter and energy scatter. Then eventually there will be so few matter interactions that complex structures will be essentially extinct.
> 
> There is some degree of necessity to this. If space did not expand and the distribution of matter approached uniformity then Boltzmann brains would become more numerous than structured brains for almost all time. The frequency of our structured existence relative to Boltzmann brains would then diminish. The expansion of space and the eventual dearth of matter interactions ensures that our existence remains relatively relevant.
> 
> There is little hope in yonder years. We should be content with a few billion years, though some of us may live much longer.
> 
>> On Jun 17, 2023, at 11:58 PM, Adrian Tymes via extropy-chat <extropy-chat at lists.extropy.org <mailto:extropy-chat at lists.extropy.org>> wrote:
>> 
>> On Sat, Jun 17, 2023 at 7:15 PM Gadersd via extropy-chat <extropy-chat at lists.extropy.org <mailto:extropy-chat at lists.extropy.org>> wrote:
>> This will buy some time, but still doesn’t avoid the inevitable heat death. If the multiverse has sufficient variety then it may be that there exists a version of each of us where some being pulls us out of the “simulation." Infinite other survival possibilities are also possible in a multiverse with sufficient variety. If all mathematical structures exist then these possibilities are inevitable, granting potential true immortality. The probabliity distribution of these possibilities remains unknown as we lack a theory of everything. Better not to put hope in speculation.
>> 
>> Is there not sufficiently little data on how universes work that the assumption of an inevitable heat death is essentially speculation at this time?  Speculation with some evidence, but much less thoroughly proven than most things we take as absolutes.
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