By Alan Guth
ISBN-10: 0201328402
ISBN-13: 9780201328400
This can be the compelling, first-hand account of Alan Guth’s paradigm-breaking discovery of the origins of the universe—and of his dramatic upward push from younger researcher to physics star. Guth’s startling theory—widely considered as some of the most very important contributions to technology through the 20th century—states that the large bang used to be set into movement through a interval of hyper-rapid “inflation,” lasting just a billion-trillion-billionth of a moment. The Inflationary Universe is the passionate tale of 1 prime scientist’s attempt to appear at the back of the cosmic veil and clarify how the universe began.</Div>
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Additional info for The Inflationary Universe
Sample text
1. The three fram es are intended to show successive images of the same region of the universe. Each frame is approximately a photographic blowup of the previous frame, with all distances enlarged by the same percentage. All galaxies are rou ghly equivalent, and are spread more or less uniformly throughout ali of space. It is further assumed that there is no center and no edge to the distribution of galaxies. As the universe evolves, from diagram (a) to (b) to (c), ali intergalactic distances are enlarged.
The value of the critica! , the Hubble constant) that one uses in the calculation. By the standards of our everyday experience, this density is astonishingly low. The critica] density corresponds to somewhere between 2 and 8 hydrogen atoms per cubic yard, a density that is more than ten million times lower than that of the best vacuum that can be achieved in an earthbound laboratory! Cosmologists would like very much to know whether the average mass density of tbe universe is more or less than this critica!
This premise was supported by the Michelson-Morley experiment of 1887, and is by now very well established. This basic premise of special relativity, however, seems at first to be nonsensical. Suppose, for example, that I am at rest, anda light beam passes me. The speed would have to be e, the standard speed of light. Suppose, now, that I take off in a spaceship to chase the light beam at 2/ 3 of the speed of light. Common sense (or Newtonian physics) implies that I would then see the light pulse receding from me at only 1/ 3 of c.
The Inflationary Universe by Alan Guth
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