SIGHTINGS


 
Universe Termed 'Immortal' -
No Beginning And No End
By Tim Radford
The Guardian - UK
1-26-99
 
The history of time is no longer brief. The universe never actually began: it bubbled off some other, pre-existing universe. And it will not come to an end: other parts of the universe are being created now.
 
"If life in our part of the universe were to disappear, it will appear again someplace else," the cosmological theorist Andrei Linde told the American Association for the Advancement of Science meeting in Anaheim, California. "So the universe as a whole becomes immortal."
 
Professor Linde, the Russian physicist based at Stanford University, is one of the architects of the new universe theories. He has discarded the Big Bang version made famous (and understandable) by the Cambridge cosmologist Stephen Hawking.
 
Linde does not believe that everything began 15 billion years ago but sees the universe in which human life developed as just one of many inflating balls of space time that in turn produce new balls, and so on for ever.
 
"The original idea was that all the universe appeared as an explosion of very hot matter, a huge ball of fire. Then we understood that this was not big enough, not fast enough, not explosive enough," he said.
 
The original hypothesis did not explain why the universe looked much the same in all directions, or why there were so many things in it.
 
In the inflation scenario, an extremely small fragment of space expanded to an area far, far larger than the visible universe in an unimaginable fraction of a second, and everything in that space - atoms, stars and light - condensed out of the colossal energy released by the inflation.
 
"Right now there are some other parts of the universe where newer and newer parts are being produced: they are inflating and expanding exponentially and then they come to a stage similar, or maybe dissimilar, to ours," he said.
 
The universe contained 100 billion galaxies each with 100 billion stars. "If you start with a typical Big Bang universe with a typical size with a typical density initially and then you count how many particles the universe would contain, the answer would be one particle, or maybe 10 particles, but not the amount of particles necessary to make one journalist," he said. "So the fact that you are here is proof something was wrong with the Big Bang theory."
 
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