It is remarkable that the elements diffused through the host of stars are some of those most closely connected with the living organisms of our globe.

May it not be that the brighter stars are like our Sun, the upholding and energizing centers of systems of living beings?

One important object of this original spectroscopic investigation of the light of the stars and other celestial bodies, namely to discover whether the same chemical elements as those of our earth are present throughout the universe, was most satisfactorily settled in the affirmative. (1909)