Einstein's greatest blunder? : the cosmological constant and other fudge factors in the physics of the universe
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書誌事項
Einstein's greatest blunder? : the cosmological constant and other fudge factors in the physics of the universe
Harvard University Press, 1995
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Includes index
内容説明・目次
内容説明
"The Big Bang: A Big Bust?" The cosmos seems to be in crisis, and you don't have to be a rocket scientist to see it. How, for instance, can the universe be full of stars far older than itself? How could space have once expanded faster than the speed of light? How can most of the matter in the universe be "missing"? And what kind of truly weird matter could possibly account for ninety percent of the universe's total mass? This brief and witty book, by the science writer Donald Goldsmith, takes on these and other key questions about the origin and evolution of the cosmos. By clearly laying out what we currently know about the universe as a whole, Goldsmith lets us see firsthand, and judge for ourselves, whether modern cosmology is in a state of crisis. "Einsten's Greatest Blunder?" puts the biggest subject of all - the story of the universe as scientists understand it - within the grasp of English-speaking earthlings. When Albert Einstein confronted a cosmological contradiction, in 1917, his solution was to introduce a new term, the "cosmological constant".
For a time, this mathematical invention solved discrepancies between his model and the best observations available, but years later Einstein called it the "greatest blunder" of his career. And yet the cosmological constant is still alive today - it is one of the "fudge factors" employed by cosmologists to make their calculations fit the observational data. Theoretical cosmologists, shows Goldmith, continually reshape their models in an honest (if sometimes futile) effort to explain apparent chaos as cosmic harmony - whether their specific concern is the age and expansion rate of the cosmos, hot versus cold "dark matter", the inflationary theory of the big bang, the explanation of large-scale structure, or the density and future of the universe.
目次
- Alice's cosmic restaurant
- gravity, motion and light
- why stars shine
- mapping the Milky Way
- the discovery of universal expansion
- looking for the Big Bang
- walls of galaxies, fingers of God
- the elusive age of the cosmos
- an uncertain future
- the inflationary theory
- the mystery of the missing mass
- in search of most of the universe
- world enough and time
- hot dark matter, cold dark matter, what's the matter.
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