Cecil Moore wrote:
The Big Bang may have happened 12.5 billion years ago
based on the length of our present seconds, but
measured using the center of the Big Bang as the time
frame reference, how long since the Big Bang?

How about this: If the length of the unit time changed by a factor of
two then the age of the universe, using the new metric, would differ
from the old by a factor of two. Same amount of time, but a different
number of units of time.

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