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Books : Science & Nature : Astronomy & Cosmology : Astronomy : Theoretical & Mathematical Astronomy
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Richard Feynman, the rock star of theoretical physics, has left an image that belies the nerdy side revealed in Feynman's Lost Lecture: The Motion of Planets Around the Sun. Not many bongo-playing surfer beatniks would have spent hours of their spare time proving Newton's law of elliptical planetary motion using only plane geometry, but Feynman's Lost Lecture shows that the great man did just that. Originally delivered to an introductory physics class at Caltech in 1963, this book contains everything the maths-savvy listener needs to savour the pleasures of applied maths. Caltech physicist David L Goodstein and archivist Judith R Goodstein found the notes and tape amid another professor's papers and set to work making sense of them; unfortunately photographs of the blackboard drawings didn't survive. The book briefly covers their find and recovery work, then presents the proof as reconstructed--crucial reading if one is to follow the lecture. There's nothing easy about it, as Feynman acknowledges in the lecture:I am going to give what I will call and elementary demonstration. "Elementary" means that very little is required to know ahead of time in order to understand it, except to have an infinite amount of intelligence.
He means, instead, that he is strictly using geometrical methods to reach his destination, which explains why it was so difficult to reconstruct without his diagrams. His charming Brooklyn accent and good humour show through in this lecture, even if the material is quite a bit drier than his fans might expect. Still, those interested in adding a new dimension to their understanding of this unquestionably brilliant scientist--and those with a deep interest in Newtonian physics--will find The Motion of Planets Around the Sun a rare and unexpected treat. --Rob Lightner
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Science fans, hold on to your hats! Lee Smolin, a professor at the Center for Gravitational Physics and Geometry at Pennsylvania State University, is about to take you on the ride of your life. Imagine, if you will, the theory of evolution applied to physics. What if our universe is so ideally adapted to life because it developed that way? What if ours is just one among many thousands of universes, all engaged in a cosmic survival-of-the-fittest struggle? These are just two of the wildly original theories Smolin posits in The Life of the Cosmos, in which Alice in Wonderland meets quantum physics. According to Smolin, the majority of today's physicists still regard physical laws as immutable, mathematical and eternally true--to them, the universe is an intricate mechanism, a cosmic clock. But what if the laws of physics aren't really "laws" at all, but rather an evolving, developing process of natural selection that began even before the Big Bang?From Smolin's initial theory, it's a short step to black holes, alternate universes, string theory, gauge symmetry and knots--all complicated abstractions that Smolin describes and explains in a remarkably comprehensible way. Even if you don't agree with Smolin's science, his book makes for great mind-bending reading and more than a little food for thought. If nothing else, The Life of the Cosmos proves once and for all that there really is intelligent life on this planet.
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