Berry, Arthur,b. 1862 · London, J. Murray · leaf 484
to be genuine binaries (chapter xn.,§ 264). In addition to a number of minor papers Struve publishedthree separate books on the subject in 1827, 1837, and 1852.*A comparison of his own earlier and later observations, andof both with Herschels earlier ones, shewed about 100 casesof change of… … 1821 Fig. 101.—The orbit of £ Ursae, shewing the relative positions ofthe two components at various times between 1781 and 1897.(The observations of 1781 and 1802 were only enough todetermine the direction of the line joining the two components,not its length.) from a comparison of Struves…
Astronomy
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