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Cosmology's CenturyAn Inside History of Our Modern Understanding of the Universe$
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P. J. E. Peebles

Print publication date: 2020

Print ISBN-13: 9780691196022

Published to Princeton Scholarship Online: January 2021

DOI: 10.23943/princeton/9780691196022.001.0001

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PRINTED FROM PRINCETON SCHOLARSHIP ONLINE (www.princeton.universitypressscholarship.com). (c) Copyright Princeton University Press, 2021. All Rights Reserved. An individual user may print out a PDF of a single chapter of a monograph in PRSO for personal use.date: 18 September 2021

Cosmological Models

Cosmological Models

Chapter:
(p.36) Chapter Three Cosmological Models
Source:
Cosmology's Century
Author(s):

P. J. E. Peebles

Publisher:
Princeton University Press
DOI:10.23943/princeton/9780691196022.003.0003

This chapter examines two spatially homogenous world pictures which captured most of the attention in cosmology from the late 1940s through the mid-1960s: an evolving universe and a universe in a statistically steady state. The evolving model describes expansion according to general relativity from an exceedingly dense early condition often termed the big bang. In the big bang model, a straightforward extrapolation of its evolution back in time ends at a singularity: a manifest failure of standard general relativity. In the alternative world picture, the continual creation of matter keeps the near-homogeneously expanding universe in a steady state. It lacked Albert Einstein's endorsement, but skillful proponents kept the picture visible in England though generally less so at other research centers. The steady-state cosmology is much more predictive than the big bang, which might have been expected to have added more than it did to general interest in the model.

Keywords:   cosmology, evolving universe, general relativity, big bang, singularity, matter, steady-state cosmology, expanding universe

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