Astronomy and Astrophysics – Astronomy
Scientific paper
Aug 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979newsc..83..506g&link_type=abstract
New Scientist, vol. 83, Aug. 16, 1979, p. 506-512.
Astronomy and Astrophysics
Astronomy
Astronomical Models, Big Bang Cosmology, Cosmology, Cepheid Variables, Deuterium, Galactic Radiation, Gravitational Collapse, Hydrogen, Interstellar Gas, Luminous Intensity, Red Shift, Steady State
Scientific paper
The current understanding of the history and fate of the universe as formulated by big bang cosmology is reviewed. The development of the concept of an expanding universe is traced from the implications of Einstein's equations of general relativity through Friedmann's solutions of the field equations describing closed and open expanding universes and corroborating observations of the nature and redshifts of the galaxies, which were incorporated into Hubble's law of the recession of galaxies. The question of the early expansion of the universe from one hundred-thousandth of a second after its creation until 700,000 years later when electrons became bound into atoms and the background radiation began to expand is then addressed. The initial collapse of matter to form dense gas clouds and galaxies is discussed, and the problem of the openness of the universe is considered, taking into account evidence supplied from deuterium abundances and estimations of the density of the universe. Attention is also given to Olber's paradox, Cepheid variables and distance measurements, and the steady-state theory of the continuous creation of matter.
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