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Page 79
... zenith sector was purchased for the observatory . An instrument like this , specially designed for zenith stars , is capable of greater rigidity than a more universal instrument ; and there is no trouble with refraction in the zenith ...
... zenith sector was purchased for the observatory . An instrument like this , specially designed for zenith stars , is capable of greater rigidity than a more universal instrument ; and there is no trouble with refraction in the zenith ...
Page 80
... zenith ; the zero being obtained from measures on circumpolar stars . Standard stars were used for giving the clock error . In 1816 a new transit instrument , by Troughton , was added , and from this date the Greenwich star places have ...
... zenith ; the zero being obtained from measures on circumpolar stars . Standard stars were used for giving the clock error . In 1816 a new transit instrument , by Troughton , was added , and from this date the Greenwich star places have ...
Page 81
... and a circle of six - feet diameter , the object - glass being eight inches in diameter . Airy , like Bradley , was impressed with the advantage of employing stars in the zenith for determining the fundamental OBSERVATION 81.
... and a circle of six - feet diameter , the object - glass being eight inches in diameter . Airy , like Bradley , was impressed with the advantage of employing stars in the zenith for determining the fundamental OBSERVATION 81.
Page 82
George Forbes. of employing stars in the zenith for determining the fundamental constants of astronomy . He devised a reflex zenith tube , in which the zenith point was deter- mined by reflection from a surface of mercury . The design ...
George Forbes. of employing stars in the zenith for determining the fundamental constants of astronomy . He devised a reflex zenith tube , in which the zenith point was deter- mined by reflection from a surface of mercury . The design ...
Page 150
... 51 Wyllie , A. , 77 Yao , 9 Young , C. A. , 103 Yu - Chi , 8 Zenith telescopes , 79 , 82 Zöllner , 92 Zucchi , 113 C.H. SIGILLUM LIBRARIES INDIANENSIS UNIVERSITATIS NDIANENSIS VERITAS ANA UNIVERSITY LIBRARIES SIGILLUM 150 INDEX.
... 51 Wyllie , A. , 77 Yao , 9 Young , C. A. , 103 Yu - Chi , 8 Zenith telescopes , 79 , 82 Zöllner , 92 Zucchi , 113 C.H. SIGILLUM LIBRARIES INDIANENSIS UNIVERSITATIS NDIANENSIS VERITAS ANA UNIVERSITY LIBRARIES SIGILLUM 150 INDEX.
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accepted accurate ancient appear astronomers attraction bodies bright calculations called catalogue cause centre century Chinese circle comet compared complete Copernicus determined diameter direction discovered discovery distance earth eclipse effect elements enabled epicycles equal error explain fact fixed follow force four Galileo gave give given gravitation heavens held Herschel increased interesting Jupiter Kepler knowledge known later LIBRARIES light lunar Mars mass mathematical mean measured method miles moon moon's motion move Newton noticed object observations Observatory opposition orbit original parallax pass period photographic physical planet planetary pole position predicted progress proper motion proved records researches revolve ring rotation round Royal satellites seems seen showed SIGILLUM solar system spectroscope spectrum stars studied sun's supposed surface tables telescope theory tion trace true Tycho Brahe UNIVERSITY VERITAS