steady state universe


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steady state universe

n.
A theoretical model of the universe in which the density of matter is constant over space and time, and the observed expansion of the universe is compensated for by the continuous creation of matter to maintain a constant density. Because of its inability to predict the observed cosmic microwave background radiation, the model has been discredited.
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.

steady state universe

A model of the universe in which the ratio of the amount of matter to volume remains the same as the universe continually gets larger. This model requires the unending creation of matter to allow for the unending expansion of the universe. It is generally believed to be discredited by the discovery of radiation remaining from the big bang. Compare big bang.
The American Heritage® Student Science Dictionary, Second Edition. Copyright © 2014 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
References in periodicals archive ?
In 1953, Sciama [5] proposed an explanation for inertia in a steady state universe model, based on an analogy to electromagnetic field theory.
Einstein invented the cosmological constant to expand the fabric of space-time after his own equations for general relativity wouldn't allow for the cosmos to remain static as expected in a steady state universe.
The competing models of the Big Bang and the Steady State Universe were both attempts in the several decades before 1948 to explain the expansion of the universe.