Scientists detect first direct echoes of the Big Bang Important finding helps clarify the origin of the universe. It is the 1st evidence of cosmic inflation ( rapid expansion of the universe ) . U.S. scientists revealed on Monday ( 17 ) the first detection of echoes of the Big Bang explosion some 14 billion years ago which led to the expansion of the cosmos . This is an important discovery in understanding the origins of the universe . The first direct evidence of cosmic inflation was observed with a telescope at the South Pole and was announced by experts from the Center for Astrophysics ( CfA ) Harvard - Smithsonian . The existence of these ripples of space-time , first echo of the Big Bang , shows the extremely rapid expansion of the universe in the first fraction of a second of its existence , a phase known as cosmic inflation . The detection of these waves is one of the most important goals of cosmology today and the result of an enormous amount of work done by a lot of scientists , said John Kovac , Professor of Astronomy and Physics at CfA and head of the research team BICEP2 , who made the discovery . Detection wave Gravitational waves are tiny , primordial ripples that spread across the cosmos . Astronomers seek the decades , because they are proof that missing two theories , one of which ushered in the current era of research on the origins and evolution of the cosmos - the General Theory of Relativity Einstein , published in 1916 - and one that gave the finishing touches on it , the theory of cosmic inflation , developed in the 1980s . A split second after the Big Bang , the explosion of the space - time universe began 13.8 billion years ago , the newborn cosmos ballooned many times their original size in less than a second quadrillionth ( represented by a number zero followed by a comma followed by 33 zeros and a 1 ) . Gravitational waves were detected by the telescope BICEP2 ( Backdrop of Cosmic Extragalactic Polarization , the acronym in English ) , which is in the South Polo The instrument , which scans the sky from that region , examines what scientists call a micro - cosmic wave background, an extremely weak radiation present in the universe . Its discovery in 1964 by astronomers Bell Labs in New Jersey, was hailed as the best evidence to date that the universe began in a hot blast immensely . Temperature difference The cosmic micro - wave background , now bathing the universe 380,000 years after the Big Bang , is a mere three degrees above absolute zero , and cooled to near non-existence immeasurably from the hot plasma that the universe was in the first fractions second of its existence. The background radiation is not exactly uniform. Like light , this relic is polarized as a result of interaction with electrons and atoms in space . Computer models predict a particular spiral pattern in the background radiation that would match what would be expected with inflation of the universe after the Big Bang . The team not only met the standard , but found to be considerably higher than expected . It was like looking for a needle in a haystack , and instead find a crowbar , said study co - leader Clem Pryke , University of Minnesota , in a statement . For the theorist Avi Loeb of Harvard University , the advance represents a new insight into some of the most fundamental issues to know why we exist and how the universe began . g1.globo/ciencia-e-saude/noticia/2014/03/cientistas-detectam-pela-primeira-vez-ecos-diretos-do-big-bang.html
Posted on: Mon, 17 Mar 2014 19:59:45 +0000
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