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Astrometrie. --- Astrophotographie. --- Satellit.

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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 2004 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.

Astrometry. --- Astrométrie. --- Positional astronomy --- Spherical astronomy --- Astrometry --- Astrométrie

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Astrophysics --- astronomy --- astrophysics --- astrofysica --- astrometrie --- theoretische sterrenkunde --- astronomie

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The field of astrometry, the precise measurement of the positions, distances and motions of astronomical objects, has been revolutionized in recent years. As we enter the high-precision era, it will play an increasingly important role in all areas of astronomy, astrophysics and cosmology. This edited text starts by looking at the opportunities and challenges facing astrometry in the twenty-first century, from space and ground. The new formalisms of relativity required to take advantage of micro-arcsecond astrometry are then discussed, before the reader is guided through the basic methods required to transform our observations from detected photons to the celestial sphere. The final section of the text shows how a variety of astronomical problems can be solved using astrometric methods. Bringing together work from a broad range of experts in the field, this is the most complete textbook on observational astrometry and is ideal for graduate students and researchers alike.

Astrometry --- Astrométrie --- Astrometry. --- SCIENCE / Astrophysics & Space Science. --- Astrométrie --- Positional astronomy --- Spherical astronomy

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Bibliothèque Houziaux

Stars --- Astrometry --- Hipparcos (satellite artificiel) --- Étoiles. --- Astrométrie. --- Hipparcos (Artificial satellite) --- Étoiles. --- Astrométrie.