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I was delighted to be invited by my colleagues Alessandra Celletti and Ettore Perozzi to provide a foreword to their book, Celestial Mechanics: The Waltz of the Planets. Having known them for many years and long admired their work in the subject so many of us love and are fascinated by, 1 read with great attention and pleasure the text when it arrived. It is a formidable task they have set themselves, to provide a book that describes attempts by successive generations of astronomers from the dawn of history five millennia ago to observe, record and understand the phenomena of the heavens, particularly the intricate and perplexing behaviour of the planets. Sun and Moon. As naked eye astronomy became aided by the telescope and the photographic plate, and since the middle of the twentieth century, by instruments launched on spacecraft into circum- Earth orbit or to the Moon and planets and beyond, the discovery of new satellites, scores of them, and ring systems displaying new and initially perplexing behaviour also demanded explanations for that behaviour. It is also the inspiring story of science itself with special reference to how lonely individuals, impelled by curiosity and dedicated to seeking the truth, and nothing but the truth, about the fascinating phenomena of nature, ultimately became accepted as scientists, those players in the most successful endeavour ever engaged in by the human race.

Celestial mechanics --- Astronomy --- Gravitational astronomy --- Mechanics, Celestial --- Astrophysics --- Mechanics --- Astronomy. --- Science (General). --- Mathematics. --- Popular Science in Astronomy. --- Astronomy, Observations and Techniques. --- Popular Science, general. --- Applications of Mathematics. --- Classical and Quantum Gravitation, Relativity Theory. --- Math --- Science --- Observations, Astronomical. --- Astronomy—Observations. --- Popular works. --- Applied mathematics. --- Engineering mathematics. --- Gravitation. --- Field theory (Physics) --- Matter --- Physics --- Antigravity --- Centrifugal force --- Relativity (Physics) --- Engineering --- Engineering analysis --- Mathematical analysis --- Astronomical observations --- Observations, Astronomical --- Properties --- Mathematics

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This book presents an overview of the outcomes resulting from applying the dynamical systems approach to space mission design, a topic referred to as "Space Manifold Dynamics" (SMD). It is a natural follow-on to the international workshop "Novel Spaceways for Scientific and Exploration Missions," which was held in October 2007 at the Telespazio Fucino Space Centre (Italy) under the auspices of the Space OPS Academy. The benefits and drawbacks of using the Lagrangian points and the associated trajectories for present and future space missions are discussed. The related methods and algorithms are also described in detail. Each topic is presented in articles that were written as far as possible to be self consistent; the use of introductory sections and of extended explanations is included in order to address the different communities potentially interested in SMD: space science, the aerospace industry, manned and unmanned exploration, celestial mechanics, and flight dynamics.

Celestial mechanics -- Mathematical models. --- Celestial mechanics. --- Celestial mechanics --- Astronomy & Astrophysics --- Physical Sciences & Mathematics --- Theoretical Astronomy --- Astrophysics --- Mathematical models --- Mathematical models. --- Gravitational astronomy --- Mechanics, Celestial --- Physics. --- Planetology. --- Astronomy. --- Astrophysics. --- Cosmology. --- Space sciences. --- Aerospace engineering. --- Astronautics. --- Astronomy, Astrophysics and Cosmology. --- Aerospace Technology and Astronautics. --- Extraterrestrial Physics, Space Sciences. --- Mechanics --- Space Sciences (including Extraterrestrial Physics, Space Exploration and Astronautics). --- Planetary sciences --- Planetology --- Astronomical physics --- Astronomy --- Cosmic physics --- Physics --- Space sciences --- Aeronautics --- Astrodynamics --- Space flight --- Space vehicles --- Science and space --- Space research --- Cosmology --- Science --- Aeronautical engineering --- Astronautics --- Engineering

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I was delighted to be invited by my colleagues Alessandra Celletti and Ettore Perozzi to provide a foreword to their book, Celestial Mechanics: The Waltz of the Planets. Having known them for many years and long admired their work in the subject so many of us love and are fascinated by, 1 read with great attention and pleasure the text when it arrived. It is a formidable task they have set themselves, to provide a book that describes attempts by successive generations of astronomers from the dawn of history five millennia ago to observe, record and understand the phenomena of the heavens, particularly the intricate and perplexing behaviour of the planets. Sun and Moon. As naked eye astronomy became aided by the telescope and the photographic plate, and since the middle of the twentieth century, by instruments launched on spacecraft into circum- Earth orbit or to the Moon and planets and beyond, the discovery of new satellites, scores of them, and ring systems displaying new and initially perplexing behaviour also demanded explanations for that behaviour. It is also the inspiring story of science itself with special reference to how lonely individuals, impelled by curiosity and dedicated to seeking the truth, and nothing but the truth, about the fascinating phenomena of nature, ultimately became accepted as scientists, those players in the most successful endeavour ever engaged in by the human race.

Science --- Mathematics --- Celestial mechanics --- Space research --- Cosmology --- Astrophysics --- Theory of relativity. Unified field theory --- astrofysica --- popularisering wetenschap --- toegepaste wiskunde --- wetenschappen --- relativiteitstheorie --- ruimte (astronomie) --- astronomie --- kosmologie