Yes it does in the same way that a mile used to be shorter.
The deal is to keep light constant ( c ) if space expands then time needs to expand also. If a mile is now mile prime then second needs to have become a second prime.
Remember there is no real space or real time it is all relative to an observer and whatever the situation is of the observer c is constant.
Quote:
Originally Posted by speedfreek
But this doesn't mean that seconds* used to be smaller, does it?
If we think that expansion is only measurable at the larger scales and only measurably affects distances outside of gravity-bound systems and not within them, does that mean that time moves very differently in the voids between the superclusters to how it does within them?
*the duration of 9,192,631,770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the caesium 133 atom
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