JF Ptak Science Books
Fritz Zwicky, "Remarks on the Redshift from Nebulae", in Physical Review; American Physical Society, November 15, 1935, volume 48, number 10, pp 808-811 in the issue of pp 779-850. Original printed wrappers. Condition: nice copy save for the bit of red ink on the spine (obscuring about 4cm) which slightly extends onto the front wrapper. $95
"Zwicky was the founder of tired light mechanisms, a term that in general refers to the idea that photons slowly lose energy on their journey through space and therefore...arrive at the observer with an increased wavelength. According to this view the galactic redshifts are not cosmological in nature and not peculiar to the galaxies; the light from all celestial objects will be redshifted proportionally to their distances from the Earth. (The name tired light is sometimes ascribed to Tolman, but always without a proper reference...)"-- "Is the Universe Expanding? Fritz Zwicky and early Tired Light Hypotheses", by Helge Kragh, Journal of Astronomical History and Heritage 20(1), 2 12 (2017). Page 2
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