Stephen Hawkings-08/03/1942-14/03/2018

Coïncidences ou révélation ! A vous d’en décider !

Le 14 mars 2018 ou simplement le 03ème mois et le 14 du mois, ou encore 3,14 ; soit le nombre Pi.

Le 14 mars 1879 est le jour de naissance d’Einstein.

Le 14 mars 2018, Stephen Hawkings quitte ce monde !

Pi Day 3.14.

With exactly the same awesome sense of humour he was known for, Hawking died at his home in Cambridge early this morning on the 30th anniversary of Pi.

Stephen William Hawking, né le 8 janvier 1942 à Oxford, est un physicien théoricien et cosmologiste britannique bien connu pour ses travaux sur les trous noirs, la cosmologie quantique et ses livres de vulgarisation sur les mêmes sujets.

Stephen William Hawking was an English theoretical physicist, cosmologist, author and Director of Research at the Centre for Theoretical Cosmology within the University of Cambridge.

Professor Stephen Hawking has worked on the basic laws which govern the universe. With Roger Penrose he showed that Einstein’s general theory of relativity implied space and time would have a beginning in the Big Bang and an end in black holes (1970). These results indicated that it was necessary to unify general relativity with quantum theory, the other great scientific development of the first half of the 20th century. One consequence of such a unification that he discovered was that black holes should not be completely black, but rather should emit ‘Hawking’ radiation and eventually evaporate and disappear (1974). Another conjecture is that the universe has no edge or boundary in imaginary time. This would imply that the way the universe began was completely determined by the laws of science. Recently Stephen has been working with colleagues on a possible resolution to the black hole information paradox, where debate centres around the conservation of information.

En utilisant les méthodes mathématiques de Penrose et en comprenant l’importance des idées de John Wheeler sur les trous noirs, les trous de vers et la cosmologie quantique, Hawking va marquer profondément la physique théorique et la cosmologie pendant les années 1970 et 1980. Influencé par les travaux de Bekenstein, Zel’dovich, Starobinsky et Linde, il se fera un nom en découvrant le rayonnement des trous noirs en 1974 et en développant plusieurs aspects importants de la théorie de l’inflation pendant les années 1980. Tous ces travaux le conduiront à développer un modèle cosmologique fascinant en 1983, universellement connu aujourd’hui sous le nom de modèle de Hartle-Hawking. Reprenant la méthode de calcul en théorie quantique dite de l’intégrale de chemin de Feynman, dont il avait pu constater l’efficacité dans ses recherches sur l’entropie et le rayonnement des trous noirs, Hawking proposait avec Hartle un modèle cosmologique fini dans l’espace et caractérisé par l’apparition du temps imaginaire au moment où l’univers était dominé par les effets de la gravitation quantique, c’est-à-dire avant le temps de Planck.

Retenons quelques citations de lui !

  1. Intelligence is the ability to adapt to change.

  2. The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge.

  3. I have noticed even people who claim everything is predestined, and that we can do nothing to change it, look before they cross the road.

  4. We are just an advanced breed of monkeys on a minor planet of a very average star. But we can understand the Universe. That makes us something very special.

  5. My goal is simple. It is a complete understanding of the universe, why it is as it is and why it exists at all.

  6. Life would be tragic if it weren’t funny.

  7. I have no idea. People who boast about their IQ are losers.

  8. People won’t have time for you if you are always angry or complaining.

  9. We only have to look at ourselves to see how intelligent life might develop into something we wouldn’t want to meet,

  10. Not only does God play dice, but… he sometimes throws them where they cannot be seen.