Astronomy for the use of schools and academies (1882)
Gillet, J. A. (Joseph Anthony), 1837-1908, Rolfe, W. J. (William James), 1827-1910 · New York : Potter, Ainsworth, & Co. · leaf 345
rison with the celestial spaces, that if one should shuthis eyes, and fire a gun at random in the air, the chance ofbringing down a bird would be better than that of a comet ofany kind striking the earth. 318. The Chemical Constitution of Comets. — Fig. 358 showsthe bands of the spectrum of a… … Fig. 359- the coma and tail. Now, these three bands are those of cer-tain hydrocarbon vapors: hence it would seem that the comaand tails of comets are composed chiefly of such vapors (315). II. THE ZODIACAL LIGHT. 319. The Geneial Appearance of the Zodiacal Light.—The phenomenon known as the…
Astronomy
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
