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steady state theory
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steady state theory
noun Astronomy.
a theory in which the universe is assumed to have average properties that are constant in space and time so that new matter must be continuously and spontaneously created to maintain average densities as the universe expands.
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2012.
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Based on the Random House Dictionary, © Random House, Inc. 2012.
Cite This Source
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Steady state theory
is always a great word to know.
So is light-year. Does it mean:
| the distance traversed by light in one mean solar year, about 5.88 trillion mi. (9.46 trillion km) |
| a natural body that revolves around a planet such as a moon |
American Heritage
Science Dictionary
| steady state theory
A cosmological theory stating that the universe has always expanded at a uniform rate with no beginning or end, that it will continue to expand and have constant density, and that the distribution of old and new objects in the universe is basically even. The theory has been largely abandoned in favor of the big bang theory, largely due to the discovery of quasars and other entities that appear only at very great distances, suggesting an absolute relationship between the age of objects and their distance. Steady state theory was also discredited by the discovery of cosmic background radiation, which was predicted by the big bang theory but not by the steady state theory. |
The American Heritage® Science Dictionary
Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
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Copyright © 2002. Published by Houghton Mifflin. All rights reserved.
Cite This Source
Word Dynamo Rating For Steady state theory
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