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ArtistSoon after research started at the site, it became evident that the proof sought would be harder to obtain than originally anticipated since the minimal shift of spectral lines was obscured by other solar influences. The reason was atmospheric turbulence on the solar surface. However, Einstein and Freundlich had from the beginning not only been interested in the specific problem of the red shift, but had also intended basic research in solar physics, and the laboratories were so designed that new equipment could be installed without difficulty. The turbulent behavior of the outer solar atmosphere soon became the primary subject of research at the Einstein Tower. The red shift could be proved only in the 1950s after it became possible to precisely analyze the complex disturbances of the solar atmosphere.