What Is Cosmological Redshift?
Why the pop science explanation is wrong
7 min readJul 21, 2021
Those who pay attention to such things know that in the first part of the twentieth century our conception of the universe expanded dramatically. Prior to then, we believed our galaxy was the universe and we believed it had always been as it is today. The universe was eternal, unchanging, unmoving. There was no particular reason to believe…