Re: understanding of the universe.

JAB <here@is.invalid> writes:

James Webb telescope confirms there is something seriously wrong with
our understanding of the universe
>
https://www.livescience.com/space/cosmology/james-webb-telescope-confirms-there-is-something-seriously-wrong-with-our-understanding-of-the-universe
>
Yes, yes....

I'm going to read it.  I hope they explain why do we know the universe
is expanding.  I've never been able to understand how that is inferred.
Have you?  Please explain.