Abstract
VIII. THERE can be little doubt that it is to the varying conditions produced by the outflows in both directions along the radius vector, to which reference was made in the last article, that the various appearances put on by the axis of comets' tails are due. Thus, in Coggia's comet, to take an instance, the perihelion passage of which took place on August 27, on June 10 the axis was brighter than the rest of the tail, but by July 10 the bright axis was replaced by one of marvellous blackness, which was one of the features of the comet at that time, and this dark axis expanded as perihelion was approached.
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References
"Forms of Comets," NATURE, vol. x. p. 268.
Webb, p. 197.
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LOCKYER, J. Notes on Meteorites 1 . Nature 39, 400–402 (1889). https://doi.org/10.1038/039400a0
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DOI: https://doi.org/10.1038/039400a0