Considering the distant galaxies, they're receding at near light speed. So according to SR, their clocks should be ticking at a much slower rates than, say, a local clock in our galaxy. OTOH, there's a physical clock for the entire universe; namely, the temperature of the CMBR. If we tell time by this clock, all clock readings of all galaxies are identical. So which is it? Are clocks in distant galaxies running slower than a local clock in our galaxy, or are both clocks running at the same rate? TIA, AG
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