Abstract
IN NATURE of June 16 there is a most interesting letter by Dr. Jeans on my suggestion that spiral nebulæ may consist of dust repelled from the stars by light-pressure. My original note must, I fear, have been somewhat misleading to have called forth the particular criticism which Dr. Jeans's letter contains. As was, I think, brought out in the discussion at the Royal Astronomical Society, it was never my intention to suggest that the dust clouds are so thick that there is any appreciable shielding; indeed it is perfectly obvious, as Dr. Jeans points out, that the whole theory would break down unless the particles are assumed to be so far apart that they can be treated individually.
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LINDEMANN, F. Gravitation and Light-Pressure in Nebulæ. Nature 111, 881 (1923). https://doi.org/10.1038/111881a0
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DOI: https://doi.org/10.1038/111881a0
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