Could these hypothetical very long distance properties of light offer alternatives to an expanding universe or a finite number of galaxies?
56753
Is it possible that galaxies' redshift is caused by something else than the expansion of space?
75070
Will the CMB eventually recede outside our observable universe?
57773
About the speed of light and gravity
96775
Einstein's static universe concept
85665
Schwarzschild metric in expanding Universe
8077
Photons in expanding space: how is energy conserved?
113304
Universe expands ... compared to what?
2191
Is there a maximum amount of photons that can exist in a certain amount of space?
96564
Is it valid to apply Einstein's Relativity to scenarios involving expansion of space?
54193
Can light exist in $2+1$ or $1+1$ spacetime dimensions?
102370
At what speed does our universe expand?
44164
Light Travels in straight line even in gravity
110030
Superluminal expansion of the early universe how is this possible?
9646
How is Doppler redshift of distant galaxies established?
12267
(Almost) double light speed
127383
Speed of light in general relativity
100799
How distorted does the Andromeda Galaxy appear to us due to the speed of light?