[MacDorcha]

"Energy doesn't get lost or go anywhere outside our universe. It simply gets redistributed very evenly, so that work becomes impossible. "

in such a case, is it safe to say that the universe would simply cease at some point? no expand, contract, up or down. no vibration at all? how would we know when we reached that state? as eternity would pass without our knwing... could we be jumpstarted by another event shedding energy into our existance? and we would start again, without having known we stopped? could this have happened already? hmm.... im not going to get sleep tonight.....

[Moonman62]

Nobody has the answers to those questions. Current observations indicate a universe that will expand forever, anyway.

The vast majority of cosmologists though, still "prefer" a universe that will eventually contract, so they are coming up with theoretical ways the universe will contract, but still explain the observed acceleration of the universe's expansion.