Practical Astronomy and Geodesy: including the projections of the Sphere and Spherical TrigonometryLongman, Brown, Green and Longmans, 1845 |
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Page xii
... Greenwich and at Gottingen 104. Description of the azimuth and altitude circle 105. Manner of verifying the positions of the wires 106. Methods of finding the error of collimation in azimuth and in altitude 107. Description of the ...
... Greenwich and at Gottingen 104. Description of the azimuth and altitude circle 105. Manner of verifying the positions of the wires 106. Methods of finding the error of collimation in azimuth and in altitude 107. Description of the ...
Page xxi
... Greenwich mean noon sidereal time at mean noon under a different meridian 310. Equation of time defined . Formula for its value · - 311. Equinoctial time 312. Manner of finding the mean time at which the sun or a fixed star culminates ...
... Greenwich mean noon sidereal time at mean noon under a different meridian 310. Equation of time defined . Formula for its value · - 311. Equinoctial time 312. Manner of finding the mean time at which the sun or a fixed star culminates ...
Page xxiv
... Greenwich time of the apparent conjunction of the sun and moon in right as- cension , at the station . Elements , from the Nautical Almanac , & c . 372. Method of finding the difference between the apparent de- clinations of the sun and ...
... Greenwich time of the apparent conjunction of the sun and moon in right as- cension , at the station . Elements , from the Nautical Almanac , & c . 372. Method of finding the difference between the apparent de- clinations of the sun and ...
Page 70
... Greenwich , the error of collimation is found by means of a telescope placed , for the purpose , in the north window of the Transit Room . See Collimator , art . 125 . 89. When it is required to ascertain that the central or meridional ...
... Greenwich , the error of collimation is found by means of a telescope placed , for the purpose , in the north window of the Transit Room . See Collimator , art . 125 . 89. When it is required to ascertain that the central or meridional ...
Page 79
... Greenwich mural instrument consists of two circles which , being on the same horizontal axis , act as counterpoises to each other , and neither plumb - lines nor spirit - levels are employed in their adjustment . They are brought as ...
... Greenwich mural instrument consists of two circles which , being on the same horizontal axis , act as counterpoises to each other , and neither plumb - lines nor spirit - levels are employed in their adjustment . They are brought as ...
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Common terms and phrases
aberration altitude angular distance apparent ascension and declination astronomical axis azimuth bisected celestial body celestial sphere centre circle colatitude computed considered correction corresponding cotan degrees described determined diameter difference disk earth ecliptic ellipse equal equator equatorial equinoctial point error expressed fixed star formula given Greenwich heliocentric horary horizontal parallax hour angle instant instrument interval latitude latter let fall mean meridian micrometer moon moon's motion movement Nautical Almanac nearly node noon nutation obliquity observed obtained P'PR parallax parallel perihelion perpendicular plane passing polar distance pole position projection radius vector refraction represented revolution revolve right angles right ascension satellite screw sector semidiameter sidereal sidereal clock sine solar sphere spherical triangle star's station subtracted sun's supposed surface tangent telescope transit transit telescope Trigon variation vertical wire zenith distance zero