Navaho Gunleg

I was researching some space phenomena, in order to better comprehend Einsteins’ writings when I hit this Redshift concept.

Quoting Wikipedia,

Redshift may be characterized by the difference between the observed and emitted wavelengths. In astronomy it is customary to refer to the relative change in wavelength, a dimensionless quantity called z and defined by the equation

OK that’s clear — it is about the difference in observed and actual emitted wavelength. Redshift occurs..

..for example, when a light source moves away from an observer in an analogous but not equivalent fashion to a Doppler shift of sound waves from a receding object. Redshift is used as a diagnostic in spectroscopic astrophysics to determine information about the dynamics and kinematics of distant objects. Most famously, redshifts are observed in the spectra from distant galaxies, quasars, and intergalactic gas clouds to increase proportionally with the distance to the object. Astronomers consider this to be one of the major forms of evidence that the universe is expanding, supporting the Big Bang model.

That’s clear as well. But then this image isn’t:

 

It seems obviously assumed that the distant galaxy actually emits the same frequencies as our Sun. There is no way for us to detect, or observe, the actual emitted frequencies. So, detecting a difference between these spectrums is downright impossible. In my humble opinion, the red shift phenomenon doesn’t seem to prove anything, or I’m missing something fundamental here.

Space, Redshift, Einstein