About Time: Einstein's Unfinished Revolution by Paul C. W. Davies

By Paul C. W. Davies

A chic, witty, and fascinating exploration of the riddle of time, which examines the results of Einstein's idea of relativity and provides startling feedback approximately what fresh examine may well reveal.
The everlasting questions of technology and faith have been profoundly recast through Einstein's concept of relativity and its implications that point should be warped by means of movement and gravitation, and that it can't be meaningfully divided into previous, current, and future.

In approximately Time, Paul Davies discusses the large bang thought, chaos concept, and the new discovery that the universe seems to be more youthful than a number of the gadgets in it, concluding that Einstein's idea offers purely an incomplete knowing of the character of time. Davies explores unanswered questions such as:

* Does the universe have a starting and an end?

* Is the passage of time in simple terms an illusion?

* Is it attainable to go back and forth backward -- or ahead -- in time?

About Time weaves physics and metaphysics in a provocative contemplation of time and the universe.

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La passione e la cu­ riosità la spinsero invece a cercare di estrarre in­ formazioni più profonde, a stabilire legami e rela­ zioni matematiche tra le quantità che leggeva nelle lastre. Così, si accorse che per una classe partico­ lare di stelle variabili, chiamate Cefeidi, esisteva una precisa relazione tra il periodo di variazione e la luminosità. Più lenta era la variazione, più luminosa era la stella. Era una scoperta formida­ bile, perché conoscere la luminosità di una stella equivale a conoscere la sua distanza.

Ma solo due anni dopo, Hubble scopre che le galassie si allontanano tra loro, e il modello di Lemaître è l’unico in grado di spiegare la cosa. ” Evidentemente la pensa così anche papa Pio XII che, in un discorso del 1951, prova a inter­ pretare il fiat lux biblico alla luce del nuovo mo­ dello cosmologico — mandando su tutte le furie Lemaître, che ha sempre badato a tenere ben se­ parate scienza e religione, le due vie che ha scelto per arrivare alla verità. “Ho troppo rispetto per Dio per poterne fare un’ipotesi scientifica”.

Georges Lemaître (1894-1966)  volte la storia è strana. Nel 1633 Galileo viene A condannato come eretico davanti al tribuna- le del Sant’Uffizio, per aver sostenuto una teoria cosmologica “espressamente contraria alla Sacra Scrittura”. Poco meno di tre secoli dopo, quando arriva il momento di formulare una nuovo modello cosmologico — un modello rivoluzionario che addirittura si azzarda a mettere il naso in una que­ stione scomoda come l’origine dell’universo — a chi tocca il compito? A un prete.

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