Once Before Time
A Whole Story of the Universe
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Once Before Time
Letto da:
Jonathan Cowley
Acquista ora a 18,95 €
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Letto da:
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Jonathan Cowley
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Di:
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Martin Bojowald
A proposito di questo titolo
Ever since, loop quantum cosmology, or LQC, has been tantalizing physicists with the idea that our universe could conceivably have emerged from the collapse of a previous one. Now the theory is poised to formulate hypotheses we can actually test. If they are verified, the big bang will give way to the big bounce. Instead of a universe that emerged from a point of infinite density, we will have one that recycles, possibly through an eternal series of expansions and contractions, with no beginning and no end.
Bojowald’s major realization was that unlike general relativity, the physics of LQC do not break down at the big bang. The greatest mystery surrounding the origin of the universe is what cosmologists call the big bang “singularity”—the point at the beginning of the universe, prior to the existence of space and time, when gravity, along with the temperature and density of the universe, becomes infinite. The equations of general relativity can’t cope with such infinities, and as a result big bang theory has never been able to give any explanation for the initial condition of our universe, succeeding only in describing and explaining the evolution of the universe from that instant onward. Bojowald’s theory takes us right up to the first moment of the universe—and then back, even before the big bang itself.
Recensioni della critica
“Readers will find undoubted insights into one possible explanation of the universe at its most fundamental and will experience the work of top-level science.”
—The Wall Street Journal
“Once Before Time tells the story of Bojowald’s discovery and its implications in fascinating, eloquent, even literary prose.”
—New Scientist
“Bojowald argues precisely and meticulously.”
—Providence Journal
“Bojowald manages to describe these complicated ideas without bogging down in mathematical notation. And like Stephen Hawking, he manages to help readers over the difficult spots with entertaining and literate prose.”
—Pittsburgh Post-Gazette
“Bojowald’s explanations are thorough and logical, and his ideas and metaphors [have] panache.”
—The Columbus Dispatch
—The Wall Street Journal
“Once Before Time tells the story of Bojowald’s discovery and its implications in fascinating, eloquent, even literary prose.”
—New Scientist
“Bojowald argues precisely and meticulously.”
—Providence Journal
“Bojowald manages to describe these complicated ideas without bogging down in mathematical notation. And like Stephen Hawking, he manages to help readers over the difficult spots with entertaining and literate prose.”
—Pittsburgh Post-Gazette
“Bojowald’s explanations are thorough and logical, and his ideas and metaphors [have] panache.”
—The Columbus Dispatch
Ancora nessuna recensione