| 单词 | steady-state theory |
| 释义 | steady-state theory The cosmological theory that the universe has always existed in a steady state, that it had no beginning, will have no end, and has a constant mean density. To compensate for the observed expansion of the universe this theory postulates that matter is created throughout the universe at a rate of about 10-10 nucleon per metre cubed per year as a property of space. Because it has failed to account for the microwave background radiation or the evidence of evolution in the universe it has lost favour to the big-bang theory. It was first proposed by Hermann Bondi (1919– ), Thomas Gold (1920– ), and Fred Hoyle in 1948 |
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