Allan Sandage, The Hubble atlas of galaxies


Allan Sandage, The Hubble atlas of galaxies,

1982, United States,
Titled & dated,
Book, Very Good,
29,3  X  39 cm

The Hubble atlas of galaxies

Washington, D.C. : Carnegie Institution of Washington, (1982) 1961, 50 pages, Fifth edition.

Allan Rex Sandage (1926 – 2010) was an American astronomer. He was Staff Member Emeritus with the Carnegie Observatories in Pasadena, California. He determined the first reasonably accurate values for the Hubble constant and the age of the universe. He also discovered the first quasar.

In the early part of this century Edwin Hubble and Alan Sandage did groundbreaking work in the study of galaxies. This volume, published by Sandage after Hubble's untimely death in 1953, is the classic text which defines Hubble's classification scheme for galaxies.

This book marks the birth of galactic morphology or the classification of galaxies by their visual shape. More current works are critical of the Hubble classification scheme because it is based on one dimension: the physical shape. There are newer classification schemes based on factors like star formation, chemical composition and spectrographic features but the Hubble system remains the most widely used and recognized.

Edwin Powell Hubble (1889 – 1953) was an American astronomer who played a crucial role in establishing the field of extragalactic astronomy and is generally regarded as one of the most important observational cosmologists of the 20th century

No modern astronomer made a more profound contribution to our understanding of the cosmos than did Edwin Hubble, who first conclusively demonstrated that the universe is expanding. Basing his theory on the observation of the change in spectra of distant galaxies, called red shift, Hubble showed that this is a Doppler effect, or alteration in the wavelength of light, resulting from the rapid motion of celestial objects away from Earth.

Hubble’s discovery confirmed an equation previously arrived at by Einstein – who, however, had not trusted his own figures until Hubble proved their accuracy. Hubble supported his theory with careful measurements, but found a rate of expansion (called Hubble’s constant) that was far too high because he assumed that other galaxies were much nearer our Milky Way than they are. On the other hand, Hubble’s law, relating the distance of a galaxy to its recession velocity, remains essentially unchanged.

Photo ID: 5886

  • photographic process: Book
  • Vintage photo made by: Various Photographers

  • Allan Sandage, The Hubble atlas of galaxies
  • Allan Sandage, The Hubble atlas of galaxies
  • Allan Sandage, The Hubble atlas of galaxies
  • Allan Sandage, The Hubble atlas of galaxies
  • Allan Sandage, The Hubble atlas of galaxies
  • Allan Sandage, The Hubble atlas of galaxies
  • Allan Sandage, The Hubble atlas of galaxies

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