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The first chapter provides a historical review of progress in celestial mechanics with a list of notable (dead) practitioners of celestial mechanics. A subjective list of living practitioners might have been helpful in this chapter. Chapters two through six establish the basis of orbital motion, starting with circular motion in chapter two. The mathematical basis for orbital motion is established in chapter three using the law of gravitation and Newton's laws of motion. Successive chapters generalize and expand on the results of chapters two and three. Chapter five introduces rockets and powered flight trajectories. Chapter six introduces parabolic and hyperbolic orbits.
Chapter seven discusses two topics of great practical importance, Kepler's law and Lambert's theorem. While both of these topics are several hundred years old they continue to be rich areas for current development in celestial mechanics. These two crucial topics are well covered. Chapter eight applies the previous material to the subject of orbital transfer; this chapter is the basis for flight between planets. Chapter nine digresses into spacecraft attitude dynamics, a complete discipline in its own right. It introduces the mathematics of the physical motion of a spacecraft about a local reference system. At 25 pages, it is a tight and tidy introduction to the subject. Chapter ten is titled "Planetary Exploration" although it also covers the creation of the solar system and trajectory modification by gravity assistance. More heavily illustrated than the other chapters, chapter ten's main topic is exploration of the solar system by spacecraft. Chapter eleven introduces perturbation theory; what happens to an orbit when more than two bodies make up the gravitational system. Chapter twelve applies perturbation theory to artificial satellites of Earth. (Chapters nine and twelve ought to make you appreciate how hard it is to get those great Hubble Space Telescope images.) Chapter thirteen must have been both the easiest and hardest chapter to write since Szebehely was one of the masters of this subject. It introduces the three-body problem and solar system stability with a nod to chaos theory.
All in all, this book is an excellent introduction to the topic of celestial mechanics. To the depth that the subject is explored, there are no loose ends. (The reviewer does regret that the Introduction from the first edition of this book was omitted from the second edition.)
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Commentary: On one level, this a great adventure novel that portrays the time just before the Civil War. Twain's writing is flawless and effortless to read. There is considerable humor in the book as well. On another level, however, Twain did to slavery what Carroll O'Connor's Archie Bunker did to more contemporary racism and bigotry: shine a light on it so bright and so clear that the ugliness becomes obvious. Who is the most denigrated character in the book? Jim, for fleeing from slavery. Who is the most caring, loyal, honest, and resourceful character in the book? Jim. The anti-slavery statement is subtle but definite.
Overall, this is a great novel with a subtle but important message.
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An extension of Tom Sawyer, Huck Finn is a book that can be enjoyed by people of all ages.
-LJ
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