Methinks the author makes it much more dramatic sounding than it really is. 4.5 hours over 164,000 light years? What is the percentage error?
That difference would be HUGE as it pertains to cosmological constants, the math behind so many theories.
We are talking vast distances here and just that much of a difference would cause many theories to be tossed out. It’s isn’t the fact that the percentage is small because on a grand scale small becomes large ... it is the fact that there is a difference at all.
I remember my physics teacher telling me there was an error factor in e=MC2. As I recall it was up to 5% that they couldn’t quite find.
That's a discrepancy of one part in 3.13 billion - an incredibly huge discrepancy, considering the precision to which this important fundamental constant has been measured.
Having said that: I suspect that there is a logical explanation.
Regards,