Galaxies and the Universe

  title={Galaxies and the Universe},
  author={J. Oort},
  pages={1363 - 1370}
  • J. Oort
  • Published 1970
  • Physics
  • Science
A brief review is given of what the study of galaxies has taught us about properties of the universe. It is assumed that the universe started from a general "explosion," and that the general expansion observed today, as well as the 3�K blackbody radiation, are consequences of this explosion. The present average density in the universe is probably close to the critical value of 10-29 g/cm3. Only about 3 percent of this is contained in galaxies; the rest consists probably of intergalactic gas at… Expand
13 Citations


Problems of Cosmical Aerodynamics, I.U.T.A.M. and I.A.U
  • Symposium on the Motions of Masses of Cosmical Dimensions (Central Air Documentation Office,
  • 1951