Stephen Hawking · 176 pages
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“What you have told us is rubbish. The world is really a flat plate supported on the back of a giant tortoise.”
― Stephen Hawking, quote from A Briefer History of Time
“It's the gravity that shapes the large scale structure of the universe, even though it is the weakest of four categories of forces.”
― Stephen Hawking, quote from A Briefer History of Time
“Intelligence is the ability to adapt to change.
Stephen Hawking”
― Stephen Hawking, quote from A Briefer History of Time
“The uncertainty principle signaled an end to Laplace's dream of a theory of science, a model of the universe that would be completely deterministic. We certainly cannot predict future events exactly if we cannot even measure the present state of the universe precisely!
We could still imagine that there is a set of laws that determine events completely for some supernatural being who, unlike us, could observe the present state of the universe without disturbing it. However, such models of the universe are not of much interest to us ordinary mortals. It seems better to employ the principle of economy known as Occam's razor and cut out all the features of the theory that cannot be observed.”
― Stephen Hawking, quote from A Briefer History of Time
“If a star were a grain of salt, you could fit all the stars visible to the naked eye on a teaspoon, but all the stars in the universe would fill a ball more than eight miles wide.”
― Stephen Hawking, quote from A Briefer History of Time
“Yet if there really were a complete unified theory, it would also presumably determine our actions—so the theory itself would determine the outcome of our search for it! And why should it determine that we come to the right conclusions from the evidence? Might it not equally well determine that we draw the wrong conclusion? Or no conclusion at all?”
― Stephen Hawking, quote from A Briefer History of Time
“an elipse is an elongated circle”
― Stephen Hawking, quote from A Briefer History of Time
“El siglo XX también vio nacer otra gran teoría parcial de la naturaleza: la mecánica cuántica. Esta teoría trata los fenómenos que se producen a escalas muy pequeñas. Nuestra concepción del big bang nos indica que debió de haber un momento en que el universo muy primitivo era tan pequeño que, incluso al estudiar su estructura «a gran escala», no es posible ignorar los efectos de pequeña escala de la mecánica cuántica.
Nuestra mayor esperanza de obtener una comprensión completa del universo desde su principio hasta su final implica combinar estas dos teorías parciales en una sola teoría cuántica de la gravedad. [...] Cuando se combina la relatividad general con el principio de incertidumbre de la mecánica cuántica surge la posibilidad de que tanto el espacio como el tiempo sean finitos, pero sin tener bordes ni fronteras. Y es posible que las leyes ordinarias de la ciencia se cumplan en todos los sitios, incluida la región inicial del tiempo, sin necesidad de que haya en ella singularidad alguna.”
― Stephen Hawking, quote from A Briefer History of Time
“Por lo tanto, la mecánica cuántica introduce en la ciencia un elemento inevitable de impredecibilidad o aleatoriedad. Einstein se opuso rotundamente a ello, a pesar del importante papel que había desempeñando en el desarrollo de estas ideas. [...]
La prueba de una teoría científica es su capacidad de predecir los resultados de un experimento. La teoría cuántica limita nuestras posibilidades. ¿Limita la teoría cuántica la ciencia? Para progresar, la manera en que hacemos ciencia debe ser dictada por la naturaleza. En este caso, la naturaleza exige que redefinamos lo que entendemos por predicción: quizá no podamos predecir exactamente el resultado de un experimento, pero podemos repetirlo muchas vces y confirmar que los diversos resultado posibles ocurren con las probabilidades predichas por la teoría cuántica. Así, a pesar del primer principio de incertidumbre, no es necesario abandonar la creencia en un mundo regido por leyes físicas.”
― Stephen Hawking, quote from A Briefer History of Time
“If we do discover a complete theory, it should in time be understandable in broad principle by everyone, not just a few scientists. Then we shall all, philosophers, scientists, and just ordinary people, be able to take part in the discussion of the question of why it is that we and the universe exist. If we find the answer to that, it would be the ultimate triumph of human reason—for then we would know the mind of God.”
― Stephen Hawking, quote from A Briefer History of Time
“Dios no solo juega a los dados, a veces los tira donde no se pueden ver.”
― Stephen Hawking, quote from A Briefer History of Time
“(Alexander) Friedmann sólo dedujo un modelo de universo, pero, si sus suposiciones son correctas, hay en realidad tres posibles tipos de soluciones de las ecuaciones de Einstein, es decir, tres diferentes tipos de modelos de Friedmann, y tres diferentes comportamientos del universo.
1. En el primer tipo de solución (el que descubrió Friedmann) el universo se expande con suficiente lentitud como para que la atracción gravitatoria entre las galaxias vaya frenando la expansión hasta llegar a detenerla, tras lo cual las galaxias empiezan a aproximarse las unas a las otras y el universo se contrae.
2. En el segundo tipo de solución, el universo se expande tan rápidamente que la atracción gravitatoria no puede llegar a frenarlo nunca, aunque sí va reduciendo su ritmo de expansión.
3. Finalmente, en un tercer tipo de solución, el universo se expande con el ritmo justo para impedir que se vuelva a colapsar. La velocidad con que las galaxias se separan va disminuyendo progresivamente, pero nunca llega a alcanzar el valor cero.
[...]
Otras observaciones recientes indican que la expansión del universo en realidad no se está frenando, sino que se está acelerando.”
― Stephen Hawking, quote from A Briefer History of Time
Stephen Hawking
Born place: in Oxford, The United Kingdom
Born date January 8, 1942
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“Knowing that everything comes to an end is a gift of experience, a consolation gift for knowing that we ourselves are coming to an end. Before we get it we live in a continuous present, and imagine the future as more of that present. Happiness is endless happiness, innocent of its own sure passing. Pain is endless pain.”
― Tobias Wolff, quote from This Boy's Life
“When Elizabeth finally descended the stairs on her way to the dining room she was two hours late. Deliberately.
“Good heavens, you’re tardy, my dear!” Sir Francis said, shoving back his chair and rushing to the doorway where Elizabeth had been standing, trying to gather her courage to do what needed to be done. “Come and meet my guests,” he said, drawing her forward after a swift, disappointed look at her drab attire and severe coiffure. “We did as you suggested in your note and went ahead with supper. What kept you abovestairs so long?”
“I was at prayer,” Elizabeth said, managing to look him straight in the eye.
Sir Francis recovered from his surprise in time to introduce her to the three other people at the table-two men who resembled him in age and features and two women of perhaps five and thirty who were both attired in the most shockingly revealing gowns Elizabeth had ever seen.
Elizabeth accepted a helping of cold meat to silence her protesting stomach while both women studied her with unhidden scorn. “That is a most unusual ensemble you’re wearing, I must say,” remarked the woman named Eloise. “Is it the custom where you come from to dress so…simply?”
Elizabeth took a dainty bite of meat. “Not really. I disapprove of too much personal adornment.” She turned to Sir Francis with an innocent stare. “Gowns are expensive. I consider them a great waste of money.”
Sir Francis was suddenly inclined to agree, particularly since he intended to keep her naked as much as possible. “Quite right!” he beamed, eyeing the other ladies with pointed disapproval. “No sense in spending all that money on gowns. No point in spending money at all.”
“My sentiments exactly,” Elizabeth said, nodding. “I prefer to give every shilling I can find to charity instead.”
“Give it away?” he said in a muted roar, half rising out of his chair. Then he forced himself to sit back down and reconsider the wisdom of wedding her. She was lovely-her face more mature then he remembered it, but not even the black veil and scraped-back hair could detract from the beauty of her emerald-green eyes with their long, sooty lashes. Her eyes had dark circles beneath them-shadows he didn’t recall seeing there earlier in the day. He put the shadows down to her far-too-serious nature. Her dowry was creditable, and her body beneath that shapeless black gown…he wished he could see her shape. Perhaps it, too, had changed, and not for the better, in the past few years.
“I had hoped, my dear,” Sir Francis said, covering her hand with his and squeezing it affectionately, “that you might wear something else down to supper, as I suggested you should.”
Elizabeth gave him an innocent stare. “This is all I brought.”
“All you brought?” he uttered. “B-But I definitely saw my footmen carrying several trunks upstairs.”
“They belong to my aunt-only one of them is mine,” she fabricated hastily, already anticipating his next question and thinking madly for some satisfactory answer.
“Really?” He continued to eye her gown with great dissatisfaction, and then he asked exactly the question she’d expected: “What, may I ask, does your one truck contain if not gowns?”
Inspiration struck, and Elizabeth smiled radiantly. “Something of great value. Priceless value,” she confided.
All faces at the table watched her with alert fascination-particularly the greedy Sir Francis. “Well, don’t keep us in suspense, love. What’s in it?”
“The mortal remains of Saint Jacob.”
― Judith McNaught, quote from Almost Heaven
“Scientists are the enemies of tradition , and tradition own all the prisons. - Victor Vigny”
― Eoin Colfer, quote from Airman
“There is no pattern the human mind can devise that does not exist already within the bounds of nature...Everything we do, see, write, notate, all are an echo of the deep seams of the universe. Music is the invisible world made visible through sound.”
― Kate Mosse, quote from Sepulchre
“Something always told me I wasn't no rich white woman.”
― Lorraine Hansberry, quote from A Raisin in the Sun
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