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 191
8 then encircled by a delicate luminous ring, as illustrated byFig. 50. The planets atmosphere is probably from one and one-half to two times asdense as our own, andthe spectrum showsevidence of water-va-por in it. Many ob-servers have also re-ported faint lights asvisible at times on thedark…
Astronomy
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