I like the "tired light" theory too, which postulates that light loses energy as it travels, so old light from faraway objects appear to be red-shifted to us.
It's not a mainstream theory and is unsupported by experimental data, but as an alternative explanation of the observed reality it has an elegance that I like.
Gentleman-Tech t1_j79qkgm wrote
Reply to comment by SnooStories1286 in Serious question by Unable_Region7300
I like the "tired light" theory too, which postulates that light loses energy as it travels, so old light from faraway objects appear to be red-shifted to us.
It's not a mainstream theory and is unsupported by experimental data, but as an alternative explanation of the observed reality it has an elegance that I like.