Explanatory Supplement to the Astronomical Almanac

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3rd edition. 768 pages. 10.20x1.20x5.50 inches. In Stock. Bestandsnummer des Verkäufers __1891389858

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Über die Autorin bzw. den Autor: Sean E. Urban (Editor) Sean E. Urban graduated from the University of Maryland with a degree in astronomy in 1984. In 1985, he was hired as a staff astronomer in the Astrometry Department of the US Naval Observatory, where he eventually rose to Chief of the Cataloging and Requirements Division. In 2004, he became Chief of the Nautical Almanac Office of the US Naval Observatory, a position that he holds today. He has authored or co-authored more than 50 articles, most on positional astronomy. He is a member of the American Astronomical Society, the Division of Dynamical Astronomy, and the International Astronomical Union's Division I (Fundamental Astronomy), Commission 4 (Ephemerides), and Commission 8 (Astrometry).P. Kenneth Seidelmann (Editor) P. Kenneth Seidelmann received an Electrical Engineering degree from the University of Cincinnati in 1960, a Master of Science degree in 1962, and a Doctor of Philosophy degree in Dynamical Astronomy in 1968. He joined the Nautical Almanac Office of the U. S. Naval Observatory in 1965, where he was subsequently named Director of the Nautical Almanac Office, Director of the Orbital Mechanics Department, and Director of the Directorate of Astrometry. In 2000 he retired from the U S Naval Observatory and became a research professor in the Astronomy Department of the University of Virginia. Seidelmann is coauthor of two books, Fundamentals of Astrometry and TIME, From Earth Rotation to Atomic Physics.