Quote:
Originally Posted by sjastro
Sorry for the off topic subject but Robert's post has an interesting side story.
In the early history of quasar observations and measurements, the redshift Z of quasars was found to cluster around two regions 0<Z<0.5 and 1.95<Z<2.2.
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I recall some papers by someone called W.G. Tifft, which were actually accepted for publication in some respected high-impact journals, that claimed that redshifts have some kind of characteristic separation or periodicity ("quantized redshifts")