Abstract
GLOBULAR CLUSTERS AND SPIRAL NEBULE.—An article by Mr. A. R. Hinks in the Nineteenth Century for May gives a vivid account of the great enlargement of our conception of the size of the visible cosmos that has resulted from the work of Hale, Shapley, and Hubble at the great American observatories. The various stages in the deduction of the absolute magnitudes of the Cepheids are lucidly described; but one point in the proof, the practically perfect transparency of the celestial spaces, seems to need fuller treatment than is given in the article. The shortest proof appears to be the simultaneity of phase in light of different colours, whereas their speeds would be different in an absorbing medium.
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Our Astronomical Column. Nature 119, 725 (1927). https://doi.org/10.1038/119725b0
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DOI: https://doi.org/10.1038/119725b0