| 单词 | big bang theory |
| 释义 | > as lemmasbig bang theory 1. Astronomy. In cosmological theory: the rapid expansion of the universe from the extremely dense and hot initial state which marked its origin (estimated to have been 13.7 billion years ago); a model of the origin and early development of the universe incorporating such expansion. Frequently attributive, esp. in big bang theory. In 1948 the steady state theory of cosmology was propounded by Thomas Gold, Hermann Bondi, and Fred Hoyle, and this gained support in the 1950s (cf. steady state n. 2b). Hoyle first coined the term ‘big bang’ in a scripted radio broadcast in March 1949. He repeated it in a 1950 broadcast, the text of which was published (see quot. 1950). Seeking to draw a contrast with the steady state theory, he used ‘big bang’ to describe theories based on the concept that the universe expanded from the explosion of a ‘primeval atom’ (proposed by G. Lemaître in 1927) a finite time ago. It subsequently became the generally accepted term for such theories. ΘΚΠ the world > physical sensation > hearing and noise > degree, kind, or quality of sound > sudden or violent sound > explosive sound > [noun] > large explosion bikini1947 big bang1950 1949 F. Hoyle in Listener 7 Apr. 568/1 Earlier theories..were based on the hypothesis that all the matter in the universe was created in one big bang at a particular time in the remote past.] 1950 F. Hoyle in Listener 9 Mar. 420/2 One [idea] was that the Universe started its life a finite time ago in a single huge explosion... This big bang idea seemed to me to be unsatisfactory. 1959 Galveston (Texas) News 23 June 26/3 The so-called ‘big bang’ theory holds that the present chemical constitution of the universe was decided in half an hour five billion years ago. 1964 Listener 3 Sept. 340/2 The man who comes to astrophysics with a belief in after-life might be expected to have some thoughts about the ‘big-bang theory’. 1981 E. R. Harrison Cosmology xviii. 347/1 The universe is now bathed in the afterglow of the big bang. 1990 Sciences Jan.–Feb. 31/1 Unlike the universe envisioned in the big bang model, the plasma universe evolves without beginning and without end. 2006 New Scientist 11 Feb. 32/2 People have long sought alternatives to the classic big bang, which involves a singularity (otherwise known as a breakdown in the laws of physics) as you roll the clock back towards time zero. < as lemmas |
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