[stephenwinter2]

Since 'gravity of the universe' doesn't exist (because there is no center of mass of the universe) also its alleged counterpart 'dark energy' makes no sense. I described it in my article http://goo.gl/uQNo5L and in two PDF (links in the subtitle there).

[ehvatum]

Space itself expanding, ie inflation, doesn't require the universe to have a center of mass.

[stephenwinter2]

Exactly. Thanks for your affirmation. .. And space itself expanding doesn't require 'dark energy' and has nothing to do with momentum, acceleration etc.

[stephenwinter2]

> spdustin That's the uncertain part of the question. It's the same when you ask Does time require a force that drives it forward? The answer is We don't know yet. -- The certain part of the question is: scaling of space (in cosmic scale) can't be accelerated by 'dark energy' nor slowed down by gravity. It's not about mass, energy, momentum etc. - I really described it in my paper (see post above).

[spdustin]

I had understood that time is a side effect of entropy.

[spdustin]

Can you expand on why you believe that the expansion of space itself requires no energy?