Lately I've been doing some research about the first years of modern cosmology, around the second decade of 20th century, and trying whenever I can to go to the sources or the original papers of Einstein and de Sitterand also Hubble and to my surprise I find a rather different story from that told in modern cosmology books, mostly in what relates to the expanding universe issue, looks like someone around the 30's decided that the "expanding universe" was the only valid hypothesis and discarded any other interpretations of redshift. I found that de Sitter in 1917 predicted redshifts in relation with distance in his model B "de sitter universe" and even called it "spurious radial velocity", and Hubble himself in his 1929 often cited paper atributed the redshifts to this "de sitter effect", and this paper is the one I've seen cited dozens times in cosmology books like the one "in wich Hubble discovered the expansion of the universe". I Know Eddington had a lot to do with this a bit twisted retelling of how things happened but also Einstein and de Sitter came in later years to conform with this official cosmology. The fact is that I wondered If someone else finds this odd too.

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