01251nam a2200241Ia 4500 CTU_167403 210402s9999 xx 000 0 und d 94 522.1 D547 Dick, Steven J. Sky and ocean joined : The U.S. Naval Observatory, 1830-2000 Steven J. Dick New York Cambridge University Press 2003 This volume is, first and foremost, a story of the relations between space, time and navigation, from the rise of the chronometer in the U.S. to the Global Positioning System of satellites, for which the Naval Observatory provides the time to a billionth of a second per day. It is a story of the history of technology, in the form of telescopes, lenses, detectors, calculators, clocks and computers over 170 years. It describes how one scientific institution under government and military patronage has contributed, through all the vagaries of history, to almost two centuries of unparalleled progress in astronomy. Astronomy,Thiên văn học History United States Tuyến Trung tâm Học liệu Trường Đại học Cần Thơ