Big Bang


Big Bang
(infml)
(in Britain) the name given to the introduction of important changes to the London Stock Exchange rules in 1986, when some controls were removed and new ways of trading allowed.

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Model of the origin of the universe, which holds that it emerged from a state of extremely high temperature and density in an explosive expansion 10 billion–15 billion years ago.

Its two basic assumptions
that Albert Einstein's general theory of relativity correctly describes the gravitational interaction of all matter and that an observer's view of the universe does not depend on direction of observation or on location
make it possible to calculate physical conditions in the universe back to a very early time called the Planck time (after Max Planck). According to the model proposed by George Gamow in the 1940s, the universe expanded rapidly from a highly compressed early state, with a steady decrease in density and temperature. Within seconds, matter predominated over antimatter and certain nuclei formed. It took another million years before atoms could form and electromagnetic radiation could travel through space unimpeded. The abundances of hydrogen, helium, and lithium and the discovery of cosmic background radiation support the model, which also explains the redshifts of the light from distant galaxies as resulting from the expansion of space.

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Universalium. 2010.

Look at other dictionaries:

  • Big-Bang — Pour les articles homonymes, voir Big Bang (homonymie). Chronologie du Modèle standard de la cosmologie …   Wikipédia en Français

  • Big-bang — Pour les articles homonymes, voir Big Bang (homonymie). Chronologie du Modèle standard de la cosmologie …   Wikipédia en Français

  • Big bang — Pour les articles homonymes, voir Big Bang (homonymie). Chronologie du Modèle standard de la cosmologie …   Wikipédia en Français

  • Big Bang — (빅뱅) …   Википедия

  • big-bang — [ bigbɑ̃g ] n. m. VAR. big bang • 1956; angl. amér. big bang « grand boum », expression appliquée ironiquement par Fred Hoyle aux théories de Georges Lemaître sur l « atome primitif » ♦ Didact. Théorie cosmologique selon laquelle l Univers a son… …   Encyclopédie Universelle

  • Big Bang — 〈[ bı̣g bæ̣ŋ] m.; s; unz.〉 Urknall [engl., „großer Knall“] * * * Big Bang [ bɪg bæŋ ], der; s, s [engl. big bang, eigtl. = großer Knall]: Urknall. * * * Bịg Bang   [ bæȖ; englisch »großer Knall«] der, (s) …   Universal-Lexikon

  • Big Bang — bezeichnet: die Entstehung des Universums nach dem „Standardmodell“ der Kosmologie, siehe Urknall den Titel eines Buches zum Urknall, siehe Big Bang (Buch) die Sprengung der militärischen Anlagen auf Helgoland, siehe Operation Big Bang größere… …   Deutsch Wikipedia

  • big bang — ou big bang [bigbɑ̃g] n. m. sing. ÉTYM. 1956 (→ cit.); anglo amér. big bang « grand boum », expression appliquée ironiquement par l astronome américain Fred Hoyle aux théories du mathématicien belge Georges Lemaître sur l « atome primitif ». ❖ ♦… …   Encyclopédie Universelle

  • big\ bang — [ bigbɑ̃g ] n. m. VAR. big bang • 1956; angl. amér. big bang « grand boum », expression appliquée ironiquement par Fred Hoyle aux théories de Georges Lemaître sur l « atome primitif » ♦ Didact. Théorie cosmologique selon laquelle l Univers a son… …   Encyclopédie Universelle

  • big bang — ig bang n. (Astron.) The explosive event marking the beginning of the known universe, according to {big bang theory}; the beginning of time. Note: The big bang is likened to a massive explosion from a point containing all of the matter and… …   The Collaborative International Dictionary of English

  • Big Bang — [ big bæŋ] der; [s] <aus engl. big bang »großer Knall«> Bez. für die ↑hypothetische Urexplosion bei der Entstehung des Weltalls; Urknall …   Das große Fremdwörterbuch


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