We now know a few things:
Spectra can be obtained from light from the sun, from other stars in the galaxy, and from other galaxies.
The Fraunhofer lines in such spectra provide information on the composition of the source of the spectra.
But why did only the Fraunhofer lines move to red and not all the other wavelengths?
Well, because all the wavelengths have shifted to red, but we still see all the colours we expect in spectra as the ultraviolet and even shorter wavelengths moved closer to red. So we see wavelengths that we could not see before. These wavelengths on the red side of the spectra have also moved further to red and therefore infrared and longer. We can no longer see the red we saw before.
When thinking about the great beyond, we as adults sometimes wonder why such greatness has been given to us to explore.
It is a child's dream to do so. Maybe things are done for a reasons we have not acknowledged yet but soon will. The universe is a wonderful open speck of space that has yet to be explored to the fullest!
