What about the possibility the Universe we live in is Infinite, it has no beginning or end, distant galaxies at the edges of the known universe are expanding because the space to expand in is infinite.
My prediction is that in some number of future years when there is another telescope like the James Webb Telescope that is multiple time more powerful, we will find galaxies far beyond what we now know about with our current technology.
Mankind is always trying to find the beginning and end of things, what if that view is wrong and there is no end or beginning.
We are but a drop on a microscope slide. The glass coverslip has been placed on top and we are being squished outward.
We call it a expanding universe but the alien calls it a mess he has to clean up later.
Later the alien will take the microscope slide off and place us near the window where the alien sun will dry us out. We will call it a contracting universe...
Possibilities...
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6. Observed discrepancies between light/magnetic wavelength redshift and intensity drop-off are caused by time dilation. If local time is slowing due to expanding space it would cause changes in observed wave frequencies. Cycles per second would increase as seconds get longer.