A community of matter appears to exist throughout the visible universe, for the stars contain many of the elements which exist in the Sun and Earth. It is remarkable that the elements most widely diffused through the host of stars are some of the most closely connected with the living organisms of our globe, including hydrogen, sodium, magnesium and iron. May it not be that, at least, the brighter stars are like our Sun, the upholding and energizing centres of systems of worlds, adapted to be the abode of living beings?

— William Huggins