Newcomb, Simon, 1835-1909, Holden, Edward Singleton, 1846-1914, joint author · New York, H. Holt · leaf 412
efore, is to present the principal characteristics ofcomets, as shown by observation, and to explain what iswanting to reconcile these characteristics with the knownproperties of matter. In the first place, all comets which have been examinedwith the spectroscope show a spectrum composed, in partat… … Fig. 105.— spectra of olefiant gas and of a comet. In the annexed figure the upper speetrum, A, is that of carbontaken in olefiant gas, and the lower one, B, that of a comet. Thesespectra interpreted in the usual way would indicate, firstly, thatthe comet is gaseous ; secondly, that the gases which…
Astronomy
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