Stephen Hawking citations
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Stephen William Hawking , né le 8 janvier 1942 à Oxford, est un physicien théoricien et cosmologiste britannique.

Stephen Hawking est professeur de mathématiques à l'université de Cambridge de 1980 à 2009, membre du Gonville and Caius College, Cambridge et chercheur distingué du Perimeter Institute for Theoretical Physics. Il est connu pour ses contributions dans les domaines de la cosmologie et la gravité quantique, en particulier dans le cadre des trous noirs. Son succès est également lié à ses ouvrages de vulgarisation scientifique dans lesquels il discute de ses propres théories et de la cosmologie en général, comme le best-seller Une brève histoire du temps , qui est resté sur la liste des records des best-sellers du Sunday Times pendant 237 semaines consécutives. Hawking souffre d'une forme rare, de début précoce et d'évolution lente, de sclérose latérale amyotrophique ; sa maladie a progressé au fil des ans et l'a laissé presque complètement paralysé.

La clé des principaux travaux scientifiques de Stephen Hawking à ce jour est fondée, en collaboration avec Roger Penrose, sur l'élaboration des théorèmes des singularités dans le cadre de la relativité générale, et la prédiction théorique que les trous noirs devraient émettre des radiations, aujourd'hui connues sous le nom de radiations de Hawking . C'est un physicien théoricien de renommée mondiale dont la carrière scientifique s'étend sur plus de 40 ans. Ses livres et ses apparitions publiques ont fait de lui une célébrité universitaire. Il est membre honoraire de la Royal Society of Arts et membre à vie de l'Académie pontificale des sciences.

✵ 8. janvier 1942 – 14. mars 2018   •   Autres noms Stephen William Hawking, Стивен Хокинг
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Stephen Hawking Citations

“La chose la plus incompréhensible de l'Univers, c'est qu'il soit compréhensible.”

Selon le magazine La Recherche (numéro 370 de décembre 2003 à la page 34) http://www.larecherche.fr/savoirs/epistemologie/univers-est-il-intelligible-01-12-2003-84130, la formulation correcte est : L'éternellement incompréhensible à propos du monde est sa compréhensibilité.
Albert Einstein, Physique et réalité, 1936.
Y a-t-il un grand architecte dans l'univers ?, 2011

“J'utilise le mot Dieu dans un sens impersonnel, comme Einstein le faisait pour les lois de la nature.”

Question de sciences et vie : A plusieurs reprises, dans votre livre, vous mentionnez Dieu. Qu'entendez-vous exactement par Dieu ?

Stephen Hawking: Citations en anglais

“Disorder increases with time because we measure time in the direction in which disorder increases.”

Stephen Hawking livre Une brève histoire du temps

Source: A Brief History of Time (1988), Ch. 9
Contexte: Just like a computer, we must remember things in the order in which entropy increases. This makes the second law of thermodynamics almost trivial. Disorder increases with time because we measure time in the direction in which disorder increases. You can’t have a safer bet than that!

“God abhors a naked singularity.”

Stephen Hawking livre Une brève histoire du temps

Source: A Brief History of Time

“Many people would claim that the boundary conditions are not part of physics but belong to metaphysics or religion. They would claim that nature had complete freedom to start the universe off any way it wanted.”

"The Quantum State of the Universe", Nuclear Physics (1984) <!-- B239, p. 258 -->
Contexte: Many people would claim that the boundary conditions are not part of physics but belong to metaphysics or religion. They would claim that nature had complete freedom to start the universe off any way it wanted. That may be so, but it could also have made it evolve in a completely arbitrary and random manner. Yet all the evidence is that it evolves in a regular way according to certain laws. It would therefore seem reasonable to suppose that there are also laws governing the boundary conditions.

“Women. They are a complete mystery.”

Response when asked what he thinks about most during the day, "Stephen Hawking at 70: Exclusive interview" http://www.newscientist.com/article/mg21328460.500-stephen-hawking-at-70-exclusive-interview.html in New Scientist (4 January 2012)

“The greatest enemy of knowledge is not ignorance. It is the illusion of knowledge.”

Sometimes attributed to Hawking without a source, but originally from historian Daniel J. Boorstin. It appears in different forms in The Discoverers (1983), Cleopatra's Nose (1995), and introduction to The Decline and Fall of the Roman Empire (1995)
Misattributed

“I am discounting reports of UFOs. Why would they appear only to cranks and weirdos?”

As quoted in a TED talk, " Asking Big Questions about the Universe http://www.ted.com/talks/view/id/242"

“I have hardly ever known a mathematician who was able to reason.”

Plato, The Republic, Book VII, 531-E
Misattributed

“Galileo, perhaps more than any other single person, was responsible for the birth of modern science.”

Stephen Hawking livre Une brève histoire du temps

Source: A Brief History of Time (1988), p. 179

“Science could predict that the universe must have had a beginning.”

Stephen Hawking livre Black Holes and Baby Universes and Other Essays

Black Holes and Baby Universes and Other Essays (1993)

“Evolution has ensured that our brains just aren't equipped to visualise 11 dimensions directly. However, from a purely mathematical point of view it's just as easy to think in 11 dimensions, as it is to think in three or four.”

As quoted in "Return of the time lord" in The Guardian http://books.guardian.co.uk/departments/scienceandnature/story/0,6000,1579384,00.html (27 September 2005)

“I used to think that information was destroyed in black holes. But the AdS/CFT correspondence led me to change my mind. This was my biggest blunder, or at least my biggest blunder in science.”

"Stephen Hawking at 70: Exclusive interview" http://www.newscientist.com/article/mg21328460.500-stephen-hawking-at-70-exclusive-interview.html in New Scientist, (4 January 2012). In his comment that he "used to think that information was destroyed in black holes", he is referring to the black hole information paradox.

“I regard [the many worlds interpretation] as self-evidently correct. [T. F.: Yet some don't find it evident to themselves. ] Yeah, well, there are some people who spend an awful lot of time talking about the interpretation of quantum mechanics. My attitude — I would paraphrase Goering—is that when I hear of Schrödinger's cat, I reach for my gun.”

Heard in person by this contributor when Hawking showed-up in a Caltech physics class taught by Robert Christy in 1980 or '81; when asked about collapse of the state-vector he whispered to his assistant Chris (surname unknown) something at which point Chris stood up and said 'Stephen is paraphrasing Herman Göring by saying "When I hear the words 'Schrödinger's Cat' I reach for my gun."'.
Source: In a conversation with Timothy Ferris (4 April 1983), as quoted in The Whole Shebang (1998) by Timothy Ferris, p. 345 http://books.google.com/books?id=qjYbQ7EBAKwC&lpg=PA345&ots=F6VWymjiPx&dq=%22reach%20for%20my%20revolver%22%20hawking%20-%22oft-made%22&pg=PA345#v=onepage&q=%22reach%20for%20my%20revolver%22%20hawking%20-%22oft-made%22&f=false

“The Dreams that Stuff is Made of”

Title of a collection, by Hawking, of the most significant papers in Quantum mechanics: The Dreams That Stuff Is Made of : The Most Astounding Papers of Quantum Physics and How They Shook the Scientific World (2011)

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