. THE OK THE IN THE DIRECTION" OF SERPENS AND SAGITTARIUS. (From a pkolograph by Pro/essor .Vax Wo!f.) been devised ; and in this way it is now possible to the distances of hundreds of stars by the spectro- speak with some degree of confidence of the scale on scope, and thus to add enormously to our knowledge which the universe is built. In the first place, Kapteyn, of exact stellar distances. Thirdly, Professor H. N. as early as 1901, indicated the possibility of ascertain- Russell, of Princeton, from his study of " eclipsing- ing the mean paraUaxes of groups of
. THE OK THE IN THE DIRECTION" OF SERPENS AND SAGITTARIUS. (From a pkolograph by Pro/essor .Vax Wo!f.) been devised ; and in this way it is now possible to the distances of hundreds of stars by the spectro- speak with some degree of confidence of the scale on scope, and thus to add enormously to our knowledge which the universe is built. In the first place, Kapteyn, of exact stellar distances. Thirdly, Professor H. N. as early as 1901, indicated the possibility of ascertain- Russell, of Princeton, from his study of " eclipsing- ing the mean paraUaxes of groups of stars. Secondly, variable " stars, was able to ascertain the absolute
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