Cosmology

Details Cosmology Cosmology

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984esasp.213....3v&link_type=abstract

In ESA QUASAT: A VLBI Obs. in Space p 3-6 (SEE N85-16700 07-88)

Astronomy and Astrophysics

Astronomy

1

Background Radiation, Big Bang Cosmology, Extraterrestrial Radiation, Galactic Clusters, Hubble Diagram, Microwave Spectra, Radio Sources (Astronomy), Extraterrestrial Matter, Galactic Evolution, Hubble Constant, Red Shift

Scientific paper

The observational astronomy basis for cosmology is reviewed. Efforts to determine the Hubble expansion rate, the deceleration parameter, density, the cosmological constant, and the mean random velocity of galaxies are discussed. For astronomers the homogeneous, isotropic world models of Friedmann still serve. The observational characteristics of the microwave background confirm the models' empirical worth. Microwave radiation enables physicists to describe the early epochs of the universe, the first minutes to 10 to the minus 43 sec. Superclusters may contain the key to the problems separating these two domains. Populations of strong radio sources provide the most direct and pronounced evidence for astrophysical evolution.

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