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Forum » SpaceEngine » Off-topic Discussions » The Future of Humanity & Intelligent life in the universe
The Future of Humanity & Intelligent life in the universe
WatsisnameDate: Sunday, 28.08.2016, 00:27 | Message # 346
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Quote Alek ()
though at that rate it would take an extremely long time, as even if it were 1 sec/sec timstep, to simulate the universe so far would take as long as it has so far, and running at a much slower rate like what you stated would take a very much longer time, possibly long enough for this black hole to decay via hawking radiation


It would be tempting to think, but Doc is actually right. smile Let's run the numbers:

The time it takes for a black hole to evaporate (this isn't a completely rigorous calculation, but it will do) is



The most massive black holes our universe will produce are in the range of 1010 to 1012 solar masses. Let's consider one of 1010 times the mass of the Sun in a "higher universe" which is supporting the supercomputer running our universe on it with the same laws of physics. The time it takes that black hole to evaporate is ~7x10104 seconds, or 2x1097 years.

Imagine the simulation is performing one time-step per thousand years. At this rate it would achieve 2x1094 steps of time. This is a big number.

The smallest meaningful length of time in our universe seems to be the Planck time: 5.39x10-44 seconds. So assume this simulation has each time step equal to the Planck time. This is a small number. But is 1097 more big than 10-44 is small? Oh yeah. And is it sufficiently more big that when you put them together it amounts to more than our universe's age worth of time?

Oh yes. This number of time-steps would simulate a total of: 4x1043 years. Which is 3x1033 times longer than our universe has existed. Heck, we could even do this (if we could do this) around a mere 100 solar mass black hole, have it take 14 billion years to do one time step of one unit of Planck time, and it would still have enough time to simulate the entire history of the universe 100 times over. (That's a lot of 'time' in one sentence.)

Which is all just a fancy way of saying... black hole evaporation is very slow, for big black holes.





 
DoctorOfSpaceDate: Sunday, 28.08.2016, 01:00 | Message # 347
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This guy has some interesting input on the subject


I just noticed this discussion on simulations is now going on in a couple threads. Maybe we should have a thread discussing this specific idea or find a more appropriate thread?





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WatsisnameDate: Sunday, 28.08.2016, 03:29 | Message # 348
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Sounds good to me. Seems like a popular and recurring topic. smile




 
soapstermoavinisDate: Sunday, 28.08.2016, 12:32 | Message # 349
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Quote DoctorOfSpace ()
We could always harness black holes for energy and extend life into the far future.

But how?
 
DoctorOfSpaceDate: Sunday, 28.08.2016, 21:03 | Message # 350
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Quote soapstermoavinis ()
But how?


Both of these videos discuss the idea



Penrose process









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xdark_princexDate: Tuesday, 30.08.2016, 06:48 | Message # 351
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you know every time its going to end up with someone (maybe me) saying "well your mom's a black hole."




Resistance Is Futile, You Will Be Assimilated.
 
spacerDate: Tuesday, 30.08.2016, 15:42 | Message # 352
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DoctorOfSpace, but when all the black holes will evapurates...all we will left to do is move to other universe or die!!!




"we began as wanderers, and we are wanderers still"
-carl sagan

-space engine photographer
 
DoctorOfSpaceDate: Tuesday, 30.08.2016, 17:01 | Message # 353
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Quote spacer ()
move to other universe or die


Probably just die.





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spacerDate: Tuesday, 30.08.2016, 18:07 | Message # 354
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Quote DoctorOfSpace ()
Probably just die


Quote
because that whole dying thing doesn't sound very fun

We must find a way doctor!





"we began as wanderers, and we are wanderers still"
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WatsisnameDate: Tuesday, 30.08.2016, 18:18 | Message # 355
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This short story is appropriate.

Sekhmet Hunts the Dying Gnosis





 
DoctorOfSpaceDate: Tuesday, 30.08.2016, 18:41 | Message # 356
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Since the discussion has turned into far future, simulation hypothesis, and other ideas on the future of life I think it is only appropriate that it be moved to a thread regarding what the future holds for humanity.

I have also changed the topic title to include what the future may hold for all intelligent life.




Quote spacer ()
We must find a way doctor!


Unless there is some hidden way to punch into a new universe without dying or manufacture spacetime conditions that allow for infinite energy, it is unlikely anything will survive. Entropy really is going to be the death of everything.





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spacerDate: Tuesday, 30.08.2016, 18:47 | Message # 357
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DoctorOfSpace, dont worry doctor! your soul will be reborn in the next big bang in 10^10^56 years!
yes





"we began as wanderers, and we are wanderers still"
-carl sagan

-space engine photographer
 
steeljaw354Date: Tuesday, 30.08.2016, 18:59 | Message # 358
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Is time travel possible? Will it be possible in the future?
 
DoctorOfSpaceDate: Tuesday, 30.08.2016, 19:08 | Message # 359
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Quote steeljaw354 ()
Is time travel possible?


Mathematically yes as closed timelike curves fit within General Relativity.

Quote steeljaw354 ()
Will it be possible in the future?


Probably no

Most of what is known suggests any systems setup that would allow time travel are prevented.

If time travel is possible then where are all the time travelers?





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steeljaw354Date: Tuesday, 30.08.2016, 19:10 | Message # 360
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If it is possible, they probably don't use it since all the risks and such.
 
Forum » SpaceEngine » Off-topic Discussions » The Future of Humanity & Intelligent life in the universe
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