. The Creighton Chronicle . DOUBLE STAR SYSTEMS. William F. Rigge, S. J., F. R. A. S tkBi jgSfcSgjsSI. |HE continual increase in the number and size and per-fection of astronomical instruments, together with theprogress in the skill of men that use them and studyand measure and discuss their results, are ever lead-ing astronomers into new avenues of research and intomore refined methods of investigation. Astronomy,although the oldest of the sciences, is as vigorous andas prolific as the youngest of her sisters. It requirescontinuous and attentive reading of at least the moreprominent of the te
. The Creighton Chronicle . DOUBLE STAR SYSTEMS. William F. Rigge, S. J., F. R. A. S tkBi jgSfcSgjsSI. |HE continual increase in the number and size and per-fection of astronomical instruments, together with theprogress in the skill of men that use them and studyand measure and discuss their results, are ever lead-ing astronomers into new avenues of research and intomore refined methods of investigation. Astronomy,although the oldest of the sciences, is as vigorous andas prolific as the youngest of her sisters. It requirescontinuous and attentive reading of at least the moreprominent of the technical astronomical journals to keep pace atall with the latest advances and to remain au courant with of the most recent and refined investigations, which canto some extent be made intelligible to the ordinary non-profes-sional reader, relates to double-star systems. A few words ofintroduction will be necessary before we can approach the sub-ject in hand. A little over a century ago Sir William Herschel laid thefoundations of this branch of astronomy. He saw that manystars were not on
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