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                <text>The force of gravity acting over eons has provided the solar system with an intricate dynamical structure, much of it revealed by recent space missions. This comprehensive introduction to the dynamical features of the solar system also provides all the mathematical tools and physical models needed for a complete understanding of the subject. Clearly written and well- illustrated coverage shows how a basic knowledge of the two- and three-body problems and perturbation theory can be combined to understand features as diverse as the tidal heating of Jupiter's moon Io, the origin of the Kirkwood gaps in the asteroid belt, and the radial structure of Saturn's rings. Problems at the end of each chapter and a free Internet Mathematica® software package help students to fully develop their understanding of the subject. This volume provides an authoritative textbook for advanced undergraduate and graduate courses on planetary dynamics and celestial mechanics. It also equips students with the mathematical tools to tackle broader courses on dynamics, dynamical systems, applications of chaos theory and nonlinear dynamics. Written by two leading figures in planetary dynamics, it is a benchmark publication in the field and destined to become a classic.</text>
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The text is divided into ten chapters which progress logically in terms of the difficulty of their subject matter. They are: Fundamental Principles and Definitions, Rectilinear Motion, Central Forces, The Potential and Attractions of Bodies, The Problem of Two Bodies, The Determination of Orbits, The General Integrals of the Problem of n Bodies, The Problem of Three Bodies, Perturbations ― Geometrical Considerations, and Perturbations ― Analytical Method. Important topics cove red include general equations, motion of falling particles, the heat of the sun, simultaneous differential equations, examples where J is a function of the coordinates alone, the universality of Newton's law, determination of the orbit from the law of force, attractions of simple solids, potential and attractions of simple bodies and ellipsoids, Ivory's method and level surfaces, elements of orbits, expansions and positions in orbits, transformations of coordinates, the Laplacian and Gaussian methods of determining orbits, motion of center of mass and area integrals, motion of the infinitesimal body, surfaces of zero relative velocity, effects of the components of the disturbing force, lunar theory, method of computing perturbations, and the perturbative function.&lt;br /&gt;
Each chapter is followed by a historical sketch and bibliography pertaining to that subject. Over 200 problems appear at key points in the text, many of them answered.</text>
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Now in its fourth edition, this highly regarded book is ideal for those who wish to solve a variety of practical and recreational problems in astronomy using a scientific calculator or spreadsheet. Updated and extended, this new edition shows you how to use spreadsheets to predict, with greater accuracy, solar and lunar eclipses, the positions of the planets, and the times of sunrise and sunset. Suitable for worldwide use, this handbook covers orbits, transformations and general celestial phenomena, and is essential for anyone wanting to make astronomical calculations for themselves. With clear, easy-to-follow instructions for use with a pocket calculator, shown alongside worked examples, it can be enjoyed by anyone interested in astronomy, and will be a useful tool for software writers and students studying introductory astronomy. High-precision spreadsheet methods for greater accuracy are available at www.cambridge.org/practicalastronomy</text>
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                <text>About MICA, The Multiyear Interactive Computer Almanac 1800-2050&lt;br /&gt;&lt;br /&gt;
The Multiyear Interactive Computer Almanac (MICA Version 2.2.2 ) is a software system that runs on modern versions of Windows computers created by the U.S. Naval Observatory's Astronomical Applications Department, especially for astronomers, surveyors, meteorologists, navigators and others who regularly need accurate information on the positions, motions, and phenomena of celestial objects. MICA produces high-precision astronomical data in tabular form, tailored for the times and locations specified by the user. Unlike traditional almanacs, MICA computes these data in real time, eliminating the need for table look-ups and additional hand calculations. MICA tables can be saved as standard text files, enabling their use in other applications. Several important new features have been added to this edition of MICA, including: extended date coverage from 1800 to 2050; a redesigned user interface; a graphical sky map; a phenomena calculator (eclipses, transits, equinoxes, solstices, conjunctions, oppositions, elongations), ephemerides of Jupiter's Galilean satellites and selected asteroids; the JPL DE405 lunar and planetary ephemerides; and updated catalogs of celestial objects, including a new astrometric catalog containing about 230,000 stars.</text>
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                <text>Here, in one handy reference, are many of the past and future predictable events of interest to amateur and professional astronomers. Among the subjects covered are planetary phenomena (inferior and superior conjunctions of Mercury and Venus 2010-2040, greatest elongations of Mercury 2010-2040 and Venus 1978-2040, oppositions of Mars 1980-204, Jupiter 2000-2040, Saturn 2000-2040, Uranus 2000-2040, Neptune and Pluto 2000-2040); Equinoxes and Solstices 1-3000; phases of the Moon 1970-2050; occultations of planets and bright stars 2010-2040-; sunspot activity 1749-2014 and many other tables (calculating the Julian Day, perpetual calendar, dates of Easter Sunday, Jewish Calendar, Moslem Calendar and much, much more).</text>
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“Many celestial cycles are fleeting, destined to fade away after a few iterations as others overlap them or start up afresh. It is a fallacy to think that you can recreate planetary motions for many years by spinning back or fast-forwarding a planetarium projector. Only someone with a profound grasp of astronomical motions and relationships could have produced an authoritative book like this.&lt;br /&gt;&lt;br /&gt;
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