Shapley and Curtis documents on the universe--1921

Remember Harlow Shapley [1885-1972] and Heber Curtis [1872-1942] debates. Here are two papers by Shapley and Curtis as published in the Bulletin of the National Research Council [Volume 2, Part 3, Number 11, May 1921].

The Scale of the Universe, Harlow Shapley

Dimensions and Structure of the Galaxy, Heber Curtis


Astronomers and public perception

"The Day We Found the Universe"--H. Shapley & the Milky Way

"The Great Debate" [1921]--Shapley & Curtis