# Heat death

what is heat death of universe??????????????????

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mathman
All stars are dead and the universe is the same temperature everywhere, so nothing more can happen.

Bright
and the universe is the same temperature everywhere
and because of expansion of the universe, this temperature tends to ZERO. :(

well suppose all stars are dead then will the temperature of the universe equalise in a finite time period.............

DaveC426913
Gold Member
well suppose all stars are dead then will the temperature of the universe equalise in a finite time period.............
Correct.

what does it mean

Wallace
well suppose all stars are dead then will the temperature of the universe equalise in a finite time period.............

I think it is more of an asymptotic process, rather than something that happens in a finite time. You couldn't say 'heat death will occur in X billions years from now'.

DaveC426913
Gold Member
I think it is more of an asymptotic process, rather than something that happens in a finite time. You couldn't say 'heat death will occur in X billions years from now'.
It's certainly an asymptotic rate of cooling. But it doesn't have to reach equilibrium to be dead. At some point long before that, the universe will reach a point where there is no concentration of energy high enough to be able to sustain even modestly local entropy-reversing processes. Say, when all stars are no warmer than brown dwarfs.

Wallace