- #1
Geodesic Worm
- 11
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I've been looking all over the internet for an answer to this question, and I am yet to find one, so I've decided I'll just have to ask someone. I wasn't sure exactly which forum this thread should go in, but since it involves the expansion of the universe, I figured this would be the best forum for it.
Anyway, could someone, preferably with a good grasp of cosmology explain to me what exactly is meant when it is said that the universe is expanding AND YET we live in a block universe, how can a tenseless universe expand? Wouldn't expansion of the system require time to exist outside the system as opposed to being a feature of the system.
I did assume that the expansion was a referrence to the shape of the universe, in the sense that the further along the time axis you are, the larger the spatial dimensions would be, increasing the potential states for energy and matter to occupy and thus explaining the increase in entropy from low when space was constrained at the big bang to high when space is big and cold (so to speak) and subsequently the apparent arrow of time, etc. However, lately I've gotten the impression from reading up on things that this model isn't the accepted view, so now I'm just lost. Can someone please steer me back on track? Would be appreciated, thanks
Anyway, could someone, preferably with a good grasp of cosmology explain to me what exactly is meant when it is said that the universe is expanding AND YET we live in a block universe, how can a tenseless universe expand? Wouldn't expansion of the system require time to exist outside the system as opposed to being a feature of the system.
I did assume that the expansion was a referrence to the shape of the universe, in the sense that the further along the time axis you are, the larger the spatial dimensions would be, increasing the potential states for energy and matter to occupy and thus explaining the increase in entropy from low when space was constrained at the big bang to high when space is big and cold (so to speak) and subsequently the apparent arrow of time, etc. However, lately I've gotten the impression from reading up on things that this model isn't the accepted view, so now I'm just lost. Can someone please steer me back on track? Would be appreciated, thanks