It is certainly a wonderful, a brain-staggering conception... that our own stellar universe may be but one of hundreds of thousands of… — Heber Doust Curtis Copy Share Image
The evidence at present available points strongly to the conclusion that the spirals are individual galaxies, or island universes, comparable with our own galaxy… — Heber Doust Curtis Copy Share Image
It is certainly a wonderful, a brain-staggering conception... that our own stellar universe may be but one of hundreds of thousands of similar universes...… — Heber Doust Curtis Copy Share Image
