Newsgroup: it.scienza.astronomia
Titolo: Il tempo cessera' in 3.2 miliaredi di anni


"
" A group of physicists from the United States and Japan argued
" that, according to their calculations, there is a 50%
" probability that the time will "cease to flow" in the next
" 3.7 billion years. However, other theorists are extremely
" skeptical about their conclusions, calling the authors "sophists."
"
" The universe was formed approximately 13 billion years ago as
" a result of the  Big Bang and since then continuously expanded.
" Also, all data from the observable part of space suggest that
" this expansion is accelerated, which means that the universe
" will expand indefinitely.
"
" Rafael Bousso of the Center for Theoretical Physics, University
" of California at Berkeley and his colleagues rebelled against
" the idea. In their article posted in the electronic library
" at Cornell University, they claim that the infinitely expanding
" universe cannot exist because the laws of physics do not work
" in infinite space. For these laws to make at least some sense,
" the universe must be finite, and they calculated the most
" probable date when it will end.
"
" Endless inflation (expansion of the universe) has several
" important consequences. Any event in it, which has non-zero
" probability, will happen an infinite number of times, the
" scientists say. But if there is an infinite number of each
" possible observation, it becomes impossible to determine the
" probability of any event. The laws of physics simply do not
" apply to this situation.
"
" The only way out of this conundrum, the authors of the article
" say, is to assume some type of disaster that would end the
" universe. Then all the probabilities again become meaningful
" and the laws of physics will regain power. The time is
" unlikely to come to an end in our time, but there is a 50%
" chance that the time will stop in the next 3.7 billion years,
" they wrote. This means that the end of times will happen
" during the lifetime of the Sun and the Earth.
"
" However, Rafael Bousso points out that although it is unknown
" what type of disaster will lead to the end of time, humanity
" will not be able to see when it happens. In other words,
" people "will fly into" the disaster at full speed before they
" have time to see some of its impact.
"
" Other theorists are extremely skeptical of this work, as well
" as other works of Bousso. "He is a fan of sophistry, a modern
" Zenon," said Alexei Starobinsky, chief researcher of the
" Institute of Theoretical Physics of Landau. According to him,
" the statement of the authors that if there is the end of time,
" it cannot be observed in normal human understanding means that
" there is no end of our time there.
"
" Starobinsky notes that Bousso and his team have misunderstood
" the phrase "eternal inflation."
"
" "It must be understood not literally, but in high philosophical
" sense - as we understand the thesis "matter is eternal." But
" our universe (or more precisely - the observable part) was at
" the inflationary stage in the past for a finite period of time,"
" said the scientist. 

 " skeptical about their conclusions, calling the authors "sophists."
Buono a sapersi, quando verrà il momento verificherò, ovviamente a 
posteriori
del momento stabilito e se il tempo continuerà a scorrere protesterò, se 
invece
si fermerà mi complimenterò con gli autori della ricerca.
Saluti.
Sao 67174
P.S.: propongo gli autori per l'IGNOBEL per la Fisica del 2011 

" 3.7 billion years. However, other theorists are extremely
Desidero puntualizzare che questo non significa "tra 3,7 miliardi di
anni", ma "entro i prossimi 3,7 miliardi di anni", quindi potrebbe
essere anche domani.
-- 
Byebye from Verona, Italy
Bernardo Rossi              
b.r...@tin.it