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-3.8 cm/s per year is minuscule - c is 300,000,000 meters/sec
For galaxies at 1 billion light years... distance may have been overestimated by 12%.
Over a distance of say 100 million light years it suggests distance may have been overestimated by 1.3 percent which is below the accuracy of distance measurements.
Anything closer it’s irrelevant.
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