Discoveries and inventions of the nineteenth century (1905)
Routledge, Robert · London : G. Routledge and Sons · leaf 493
sandmiles away from the little models of sun and earth. But not only do weknow with certainty some of the substances contained in Sirius, but thestar spectroscope has taught us a great deal about orbs so remote, thattheir distance is absolutely unmeasurable. About Aldebaran we knowthat there are… … Fig. 229.—The Planet Saturn. remarkable exception in a Ononis, the spectrum of which yields no trace•of the hydrogen lines, although it is evident that magnesium, sodium,calcium, &c., are present. The spectra of celestial bodies are of severalkinds. Many of the stars have, like our sun^ a…
Inventions
Internet Archive · Boston Library Consortium · Public Domain Mark 1.0. Free to use for anything.
