I know that is conventional. But one of the problems I know of is called the Horizon limitation. The universe' horizon is wider than the age of it, so doesn't this calibrate a problem for the earth as well? I have also heard (from Dr. S. Psarris) of a limitation on measurement called the one-way distance, but I don't understand it.
In case you don't know, my view is that there is a lifeless, random mass release by God, earlier than creation week, called the 'spreading' or 'stretching out' in Ps 104 and Is 45, but it is not what Gen 1 is about, because the Hebrew
'shami' is limited to the local system, and some visibly moving objects (Regulus, for ex), that mark or make signs or communicate. The mass release was earlier and results, for one thing, in the
unformed and unfilled earth. It also results in what 1:16 barely mentions as distinct from the '
shami' which is the '
kavov' or stars. The 2nd reference to the '
kavov' is the incredible amount of them in Gen 15 representing how many descendants Abraham will have, in the Gospel of course.
If Day 1, when starlight arrives on earth, is enough starlight for the narrator to say that day and night could be distinct, then it must be referring to objects near us in the MW. Centauri is 4 years away, but by itself I doubt it is enough to satisfy the meaning of Day.
If you can, please see the video at the 1st and 20th seconds when pre-Day 1 and Day 1 are distinguished by just enough light on earth to make it (yes, it is there pre-Day 1). Do you think these match the text?
The journal is now some 150 pages of support material for you to consume.