Heber Doust Curtis Quote

The evidence at present available points strongly to the conclusion that the spirals are individual galaxies, or island universes, comparable with our own galaxy in dimension and in number of component units.

Stating his conviction on the nature of nebulae during the Shapley-Curtis debate on 26 Apr 1920 to the National Academy of Sciences.

The Scale of the Universe (ed. 1921)

Picture Quote 1

The evidence at present available points strongly to the conclusion that the spirals are individual galaxies, or island universes, comparable with...

Picture Quote 2

The evidence at present available points strongly to the conclusion that the spirals are individual galaxies, or island universes, comparable with...

Picture Quote 3

The evidence at present available points strongly to the conclusion that the spirals are individual galaxies, or island universes, comparable with...

Picture Quote 4

The evidence at present available points strongly to the conclusion that the spirals are individual galaxies, or island universes, comparable with...