Dust gets in the way of starlight. There's no edge of the universe.
There’s no edge of the universe.
The universe can be finite and still be unbounded (have no edge). There is no edge to the 3d surface of a 4d hyper-sphere. (eg: you can travel in any direction on the 2d surface of a sphere and never find an edge but the surface is finite)
Dust gets in the way of starlight.
If that was the case, which I think the op was implying, the dust would keep heating up to the point to would emit radiation at higher and higher energies and may have gotten to the point where it is doing so in the visible spectrum.
But... would the night sky be brighter and could we tell?
this post was submitted on 13 Dec 2023
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