Harlow Shapley

Harlow Shapley (November 2, 1885 – October 20, 1972) was an American scientist, head of the Harvard College Observatory (1921–1952), and political activist during the latter New Deal and Fair Deal.

Shapley used Cepheid variable stars to estimate the size of the Milky Way Galaxy and the Sun's position within it. In 1953 he proposed his "liquid water belt" theory, now known as the concept of a habitable zone. Provided by Wikipedia
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  1. 1

    El mundo desde una estrella : el futuro del hombre en el universo / by Shapley, Harlow, 1885-

    Published 1968
    Book
  2. 2

    De estrellas y hombres : la respuesta humana a un universo en expansión / by Shapley, Harlow, 1885-1972

    Published 1963
    Book