{"title":"Jean Kovalevsky","description":null,"products":[{"product_id":"modern-astrometry-book-jean-kovalevsky-9783642076190","title":"Modern Astrometry","description":"On the occasion ofthe second edition ofthe book, it appeared necessary to up­ date information that was already seven years old. Astrometry has recorded tremendous advances during these last years, so that, in addition to cor­ recting identified errors and misprints, there are many major modifications. Among the events that forced me to modify significantly the contents of the book, the most important are the release of the Hipparcos and Tycho cata­ logues, the introduction of CCD astrometry, the decision of the International Astronomical Union to adopt a new celestial reference frame, the dramatic improvement of accurate time and frequency standards, the decision taken by space agencies to prepare several new space astrometry satellites and the development of optical interferometry. The description and the consequences of these events have been included in this edition. One of them is that a mi­ crosecond of arc or microarcsecond (uas) has become a widely used unit. On the contrary, the result was also that the importance of some in­ struments such as astrolabes or transit circles has decreased. However, I left but because their description unchanged, not only for their historical interest, newer techniques often use similar data reduction methods so that one can refer to them. Conversely, some methods or instruments have evolved and new information is included. Finally, many new references were added to the original list.","brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51061870428433,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51061873770769,"sku":"NIN9783642076190","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"GB \/ NEW \/ INGRAM","offer_id":52481979908369,"sku":"NLS9783642076190","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/364207619X.jpg?v=1751221965"},{"product_id":"modern-astrometry-book-jean-kovalevsky-9783540423805","title":"Modern Astrometry","description":"On the occasion ofthe second edition ofthe book, it appeared necessary to up- date information that was already seven years old. Astrometry has recorded tremendous advances during these last years, so that, in addition to cor- recting identified errors and misprints, there are many major modifications. Among the events that forced me to modify significantly the contents of the book, the most important are the release of the Hipparcos and Tycho cata- logues, the introduction of CCD astrometry, the decision of the International Astronomical Union to adopt a new celestial reference frame, the dramatic improvement of accurate time and frequency standards, the decision taken by space agencies to prepare several new space astrometry satellites and the development of optical interferometry. The description and the consequences of these events have been included in this edition. One of them is that a mi- crosecond of arc or microarcsecond (uas) has become a widely used unit. On the contrary, the result was also that the importance of some in- struments such as astrolabes or transit circles has decreased. However, I left but because their description unchanged, not only for their historical interest, newer techniques often use similar data reduction methods so that one can refer to them. Conversely, some methods or instruments have evolved and new information is included. Finally, many new references were added to the original list.","brand":"WoB","offers":[{"title":"- \/ - \/ -","offer_id":51062752575761,"sku":"","price":0.0,"currency_code":"GBP","in_stock":true},{"title":"US \/ NEW \/ INGRAM","offer_id":51062755131665,"sku":"NIN9783540423805","price":0.0,"currency_code":"GBP","in_stock":false},{"title":"GB \/ NEW \/ INGRAM","offer_id":52147516539153,"sku":"NLS9783540423805","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/354042380X.jpg?v=1751189957"},{"product_id":"relativity-in-celestial-mechanics-and-astrometry-book-jean-kovalevsky-9789027721907","title":"Relativity in Celestial Mechanics and Astrometry","description":"The driving idea, in organizing this Symposium on Relativity in Celestial Mechanics . and Astrometry was that, in recent years, the ac- curacy of several Astrometric techniques has so much increased that re- lativistic effects are no more marginally mentioned in academic presen- tations but have become an intrinsic part of the interpretation of all the positional data. Techniques such as V. L. B. I., space probes, lunar lasers, etc . . . have greatly contributed to reduce the accuracy level to an angular equivalent of a few milliarc-seconds. HIPARCOS will extend this trend to stellar astrometry and new proposals aim at gaining ano- ther one or two orders of magnitude in observing precision. In paral- lel, great progress has also been made in the theories of motion of ce- lestial bodies and more rigourous treatments within the frame of general relativity become necessary. The definition of reference frames and of various coordinate times become also a major problem in the intercompa- rison of observations produced by different methods. This Symposium gave to people using relativistic corrections in reducing their measurements or in constructing various theories of mo- tion a chance to exchange their experience in the field and to confront it with theoreticians in general relativity. The Symposium was approved by the IAU in 1983 and it was organi- zed by the Institute of Theoretical Astronomy of the USR Academy of Sciences on May 28-31, 1985.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52125677355281,"sku":"NLS9789027721907","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9789027721907.jpg?v=1757467603"},{"product_id":"reference-frames-book-jean-kovalevsky-9789401069090","title":"Reference Frames","description":"This book on reference systems is the first comprehensive review of the problem of celestial and terrestrial reference systems and frames. Over 20 years, the importance of this problem emerged slowly as the accuracy of new observational techniques improved. The topic has already been approached in several symposia such as Stresa (1967), Morioka (1971), Perth (1973), Columbus (1975, 1978 and 1985), Kiev (1977) and San Fernando (1978). Two IAU colloquia held in Turin (1974) and in Warsaw (1980) were exclusively devoted to discuss reference systems. During this time, the problem of terrestrial and celestial reference systems has been discussed also in many astronomical and geodetic symposia, but always among other topics. Thus, a review devoted solely to the definition and practical realization of such systems was needed. It is hoped that this book, containing modern comprehensive reviews of important facets of this problem will contribute not only to a better and wider understanding of the mathematics and the physics that are behind the concepts and the realizations, but also to future development in a field that can only expand with the rapidly increasing accuracy of geodetic and astronomical observations. We are pleased to thank all the authors of the book who have enthusiastically agreed to contribute to the book in their field of competence and have gracefully accepted guidance from the editors in the definition of the subject and of the interfaces with other chapters. We thank Prof. Y.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52142443102481,"sku":"NLS9789401069090","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9789401069090.jpg?v=1757580179"},{"product_id":"fundamentals-of-astrometry-book-jean-kovalevsky-9780521173315","title":"Fundamentals of Astrometry","description":"Astrometry encompasses all that is necessary to provide the positions and motions of celestial bodies. This includes observational techniques, instrumentation, processing and analysis of observational data, reference systems and frames, and the resulting astronomical phenomena. Astrometry is fundamental to all other fields of astronomy, from the pointing of telescopes, to navigation and guidance systems, to distance and motion determinations for astrophysics. In the last few decades, new observational techniques have enabled improvements in accuracy by orders of magnitude. Starting from basic principles, this book provides the fundamentals for this new astrometry at milli- and micro-arcsecond accuracies. Topics include: basics of general relativity; co-ordinate systems; vectors, tensors, quaternions, and observational uncertainties; determination and use of the celestial and terrestrial reference systems and frames; applications of new observational techniques; present and future star catalogues and double star astrometry. This comprehensive reference will be invaluable for graduate students and research astronomers.","brand":"WoB","offers":[{"title":"- \/ - \/ INTERNAL","offer_id":52430950367505,"sku":null,"price":0.0,"currency_code":"GBP","in_stock":true},{"title":"GB \/ NEW \/ INGRAM","offer_id":52430950957329,"sku":"NLS9780521173315","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9780521173315.jpg?v=1759171111"},{"product_id":"introduction-to-celestial-mechanics-book-jean-kovalevsky-9789401175500","title":"Introduction to Celestial Mechanics","description":"After the launching of the first artificial satellites preceding interplanetary vehicles, celestial mechanics is no longer a science of interest confined to a small group of astronomers and mathematicians; it becomes a special engineering technique. I have tried to set this book in this new perspective, by severely limiting the choice of examples from classical celestial mechanics and by retaining only those useful in calculating the trajectory of a body in space. The main chapter in this book is the fifth, where a detailed solution is given of the problem of motion of an artificial satellite in the Earth's gravitational field, using the methods of Von Zeipel and of Brouwer. It is shown how Lagrange's equations can be applied to this problem. The first four chapters contain proofs of the main results useful for these two methods: the elliptical solution of the two-body problem and the basic algebra of celestial mechanics; some theorems of analytical mechanics; the Delaunay variables and the Lagrangian equations of variation of elements; the expansion of the disturbing function and the Bessel functions necessary for this expansion. The last two chapters are more descriptive in character. In them I have summarized briefly some of the classical theories of celestial mechanics, and have tried to show their distinctive characteristics without going into details.","brand":"WoB","offers":[{"title":"GB \/ NEW \/ INGRAM","offer_id":52669504323857,"sku":"NLS9789401175500","price":0.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0784\/4072\/6801\/files\/9789401175500.jpg?v=1762287618"}],"url":"https:\/\/www.worldofbooks.com\/en-gb\/collections\/author-books-by-jean-kovalevsky.oembed","provider":"World of Books ","version":"1.0","type":"link"}