'New discoveries about the birth, life, and death of the sun and other stars', Harpers
Tags: 1950s; 1958; 1958-3-1; Andromeda Galaxy; Calif.); Cosmology; Gray, George W. (George William); Interstellar hydrogen; Mount Wilson Observatory (Calif.); Nebulae; Observations; Palomar Observatory (Mount Palomar; Photographic measurements; Physics; Stars; Sun
'The exploration of space', Harpers
Tags: 1920s; 1929; 1929-5-1; Astronomical instruments; Astronomy; Astronomy and Astrophysics; History; Hubble, Edwin Powell; Nebulae; Parallax; Physics; Stars; Telescopes; United States
'Photographing the nebulae with reflecting telescopes', Harpers
Tags: 1900s; 1903; 1903-5-1; Astronomical photography; Astronomy; Astronomy and Astrophysics; Nebulae; Observations; Physics; Reflecting telescopes; Ritchey, G. W. (George Willis); Technological innovations
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