Lessons in astronomy including uranography. A brief intoductory course without mathematics (1896)
Young, Charles A. (Charles Augustus), 1834-1908 · Boston, London, Ginn and company · leaf 301
; but it is now certain that, whatever it may be, nitro-gen is not the substance. Very recently Mr. Lockyer has ascribed thisline to magnesium, in connection with his meteoric hypothesis. Butrecent elaborate observations of Huggins and others show that thisidentification also is probably incorrect.… … Fig. 82. — Spectrum of the Gaseous Nebulae. among them are several of the lines of Helium. Certain stars alsoshow the nebular lines in their spectra ; and Mr. Campbell has foundone or two which show bright hydrogen lines, extending out on eachside of the star-spectrum in such a way as to indicate…
Astronomy
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