Abstract
E. Schrödinger directs attention to the fact that in an expanding universe (a) the diameters of the nebulæ, (b) their intrinsic luminosities, may quite reasonably be assumed to depend on the state of expansion. If it is true that their observed luminosities decrease with increasing distance a little too slowly even for the non-recessional explanation of the red-shift, then the recessional one has to be preferred anyhow. For though the discrepancy here becomes greater, a plausible assumption as regards (b) will easily remove it.
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Points from Foregoing Letters. Nature 144, 600 (1939). https://doi.org/10.1038/144600b0
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DOI: https://doi.org/10.1038/144600b0