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This accessible reference presents the evolution of concepts of time and methods of time keeping, for historians, scientists, engineers, and educators. The second edition has been updated throughout to describe twentieth- and twenty-first-century advances, progress in devices, time and cosmology, the redefinition of SI units, and the future of UTC.
Astrologers worldwide made the late Neil F. Michelsen's American Ephemeris series best sellers. In 2006, Rique Pottenger revised and updated Michelsen's earlier work with The New American Ephemeris for the 21st Century 2000-2100 at Midnight, complete with newly named planets Ceres and Eris, plus much more. Now, following the debut of the big full century book, astrologers will find this new, lightweight 14-year version a "must have!" In easy -to-scan 8.25 x 11 format, it has all the new features of its forerunner and even more. For each month you'll also find a daily Declination and Latitude Table and a detailed Daily Aspectarian. Both Ceres and Chiron are included in daily longitude positions, and in the aspectarian. In Declination and Latitude, Sun through Saturn (including Ceres) are given daily, with Chiron, Uranus, Neptune, Pluto, Pallas, Juno, Vesta and Eris in 5 day increments.
"As you calculate, draw, and interpret your own unique birth chart, you'll: become familiar with the inner workings of astrology ; learn the personal significance of each planet, house, sign, and aspect ; develop a better understanding of your personality and potential ; [and] find a continual source of guidance about your career, health, and relationships." -- back cover.
A valuable reference for students and professionals in the field of deep space navigation Drawing on fundamental principles and practices developed during decades of deep space exploration at the California Institute of Technology’s Jet Propulsion Laboratory (JPL), this book documents the formation of program Regres of JPL’s Orbit Determination Program (ODP). Program Regres calculates the computed values of observed quantities (e.g., Doppler and range observables) obtained at the tracking stations of the Deep Space Network, and also calculates media corrections for the computed values of the observable and partial derivatives of the computed values of the observables with respect to the solve-for-parameter vector-q. The ODP or any other program which uses its formulation can be used to navigate a spacecraft anywhere in the solar system. A publication of the JPL Deep Space Communications and Navigation System Center of Excellence (DESCANSO), Formulation for Observed and Computed Values of Deep Space Network Data Types for Navigation is an invaluable resource for graduate students of celestial mechanics or astrodynamics because it: features the expertise of today’s top scientists places the entire program Regres formulation in an easy-to-access resource describes technology which will be used in the next generation of navigation software currently under development The Deep Space Communications and Navigation Series is authored by scientists and engineers with extensive experience in astronautics, communications, and related fields. It lays the foundation for innovation in the areas of deep space navigation and communications by conveying state-of-the-art knowledge in key technologies.
This dictionary and concise world encyclopedia in one volume includes up-to-the-minute words and phrases new to the language; 10,000 revised encyclopedic articles covering current affairs, science and technology, history, people and places, the arts, sports, and many other fields; and a chronology of world events and scientific achievement through the ages.