>That's a lot of words that really didn't explain to me why, if the source of the light isn't changing in distance or intensity, then why would it appear to die out? Because "the force" in light has a limit?


Yes.

There are four fundamental forces in the Universe that encompass everything.

2 nuclear forces
the electromagnetic force (which includes light)
and gravity

These forces are interactions.

For example, the strong nuclear force explains how different quarks interact with each other.

The EM force explains how electrons and photons (light and matter) interact.

The nuclear forces have small ranges for those interactions.

They don't go very far.

Electromagnetism and gravitation are presumed to have infinite ranges.

I think they in fact have finite ranges (although, the range of gravity probably extends so far beyond our observable Universe that it is infinite for all practical purposes).

If light has a finite range, we would see a finite size of space with a finite amount of matter in it.

That's exactly what we see.

I say its the result of light's limits.

They say its because the Universe started expanding from a big bang 14 billion years ago.

They don't like the idea of light having limits.

It totally messes with their cherished ideas about space and time, mass and motion.