Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere (1875)
Lockyer, Norman, Sir, 1836-1920 · New York, D. Appleton and company · leaf 43
-Okbit of a double cause the planets are now darkStak- bodies, instead of shining, like the Sun, by their own light, as they once must have done, itis difficult, at first, to realize such phenomena, but theyare among the most firmly-established facts of modernastronomy. A beautiful star in the… … Motions to be distinguished ? By what are the Apparent Motions caused ? 66.What changes in the appearance of some stars does a powerful telescope pro-duce ? Give an account of Epsilon Lyrce. In what times will the members of this DOUBLE AND MULTIPLE STAES. 37
Astronomy
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