By Stephen W. Hawking
In physicist Stephan Hawking's significant opus, a quick background Of Time, he offered us with a daring new examine our universe, the way it started, and the way our previous perspectives of physics and drained theories in regards to the construction of the universe have been not suitable. In different phrases, Hawking gave us a brand new examine our international, our universe, and ourselves.
Now, to be had for the 1st time in a deluxe full-color version with never-before-seen images and illustrations, Hawking provides a fair extra entire examine our universe, its production, and the way we see ourselves inside it. think sitting in a snug room hearing Hawking talk about his most up-to-date theories and position them in old context with science's different nice achievements-it will be like listening to Christopher Columbus convey the scoop in regards to the new world.
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Extra info for The Illustrated Theory of Everything: The Origin and Fate of the Universe
Example text
So I coulduse it to prove that there should be a singularity only if the universe wasexpanding fast enough to avoid collapsing again, because only that Friedmannmodel was infinite in space. During the next few years I developed new mathematical techniques toremove this and other technical conditions from the theorems that provedthat singularities must occur. The final result was a joint paper by Penroseand myself in 1970, which proved that there must have been a big bang singu-larity provided only that general relativity is correct and that the universecontains as much matter as we observe.
It was therefore nat-ural to conjecture that a rotating body collapsing to form a black hole wouldend up in a state described by the Kerr solution. In 1970, a colleague and fellow research student of mine, Brandon Carter, tookthe first step toward proving this conjecture. He showed that, provided a sta-tionary rotating black hole had an axis of symmetry, like a spinning top, its sizeand shape would depend only on its mass and rate of rotation. Then, in 1971,I proved that any stationary rotating black hole would indeed have such anaxis of symmetry.
So it is now generally accepted that the universe musthave a beginning. The Theory of Everything: The Origin and Fate of the Universe Chapter 3 - THIRD LECTURE - BLACK HOLES The term black hole is of very recent origin. It was coined in 1969 by theAmerican scientist John Wheeler as a graphic description of an idea thatgoes back at least two hundred years. At that time there were two theoriesabout light. One was that it was composed of particles; the other was that itwas made of waves. We now know that really both theories are correct.
The Illustrated Theory of Everything: The Origin and Fate of the Universe by Stephen W. Hawking
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