Abstract
THE problem of determining the motion of the sun amongst the stars has undergone a great change in consequence of Prof. J. G. Kapteyn's investigations whith have recently become known. These researches mdicated that the stars surrounding us do not from a simple system, but a dual one. From a discussion of the motions of the stars of Bradley's catalogue, Prof. Kapteyn demonstrated the existence of two great streams of stars passing through one another, and found the directions of motion of these streams relative to the sun and to one another. The Bradley stars, numbering about 2600, are mainly stars visible to the naked eye; they cover nearly three-quarters of the celestial sphere, and throughout the whole of this area Prof. Kapteyn found the same two streams prevailing, and it seemed probable that all the stars he examined belonged to one or other of the two streams.
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EDDINGTON, A. The Double-Drift Theory of Star Motions . Nature 76, 248–250 (1907). https://doi.org/10.1038/076248c0
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DOI: https://doi.org/10.1038/076248c0