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.

Scientific Papers of Sir William Huggins, (ed.) Sir William Huggins & Lady Huggins (1909), 49, footnote [added in 1909 to 'On the Spectra of some of the Fixed Stars' (1864)]