Practical Astronomy and Geodesy: Including the Projections of the Sphere and Spherical Trigonometry. For the Use of the Royal Military CollegeLongman, Brown, Green, and Longmans, 1845 - 427 pages |
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Page vi
... refraction and parallax , there follow out- lines of the methods by which the elements of the solar , lunar , and planetary orbits are determined : these are succeeded by formulæ for computing the apparent displacements of celestial ...
... refraction and parallax , there follow out- lines of the methods by which the elements of the solar , lunar , and planetary orbits are determined : these are succeeded by formulæ for computing the apparent displacements of celestial ...
Page xiii
... REFRACTION : LATITUDE OF A STATION : PARALLAX . 141. Cause of the refraction of light : it takes place in a vertical plane 105 142. Refraction varies with the tangent of the zenith distance , as- suming the earth to be a plane and the ...
... REFRACTION : LATITUDE OF A STATION : PARALLAX . 141. Cause of the refraction of light : it takes place in a vertical plane 105 142. Refraction varies with the tangent of the zenith distance , as- suming the earth to be a plane and the ...
Page xiv
... refraction by circumpolar stars 107 Table of refractions 146. Refraction in high northern latitudes 108 , 109 147. Formula for the variations of polar distance and right ascen- sion in consequence of refraction - · 110 110 111 148 ...
... refraction by circumpolar stars 107 Table of refractions 146. Refraction in high northern latitudes 108 , 109 147. Formula for the variations of polar distance and right ascen- sion in consequence of refraction - · 110 110 111 148 ...
Page 77
... refraction : then , since the pole is equally distant from the two corrected places of the star , half the sum of the altitudes so corrected will evidently be the required polar point . A mean of the like observations on several ...
... refraction : then , since the pole is equally distant from the two corrected places of the star , half the sum of the altitudes so corrected will evidently be the required polar point . A mean of the like observations on several ...
Page 87
... refraction due to the star's altitude : the sum of these values is the corrected instrumental distance of the star from the pole ; and , being compared with the polar distance of the star in the Nautical Almanac , the difference will be ...
... refraction due to the star's altitude : the sum of these values is the corrected instrumental distance of the star from the pole ; and , being compared with the polar distance of the star in the Nautical Almanac , the difference will be ...
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Practical Astronomy and Geodesy: Including the Projections of the ..., Volume 5 John Narrien No preview available - 2016 |
Common terms and phrases
angular distance apparent ascension and declination astronomical azimuth bisected celestial body celestial sphere centre circle passing circumference colatitude computed considered correction corresponding cosine cotan degrees described determined diameter difference earth ecliptic ellipse equal equator equatorial equinoctial point expressed fixed star formula geocentric given graduation Greenwich Greenwich mean horary motions horizontal parallax hour angle index error instant instrument interval latitude latter let fall limb longitude mean noon meridian micrometer moon moon's Nautical Almanac node observed altitude obtained optical axis orbit parallax parallel perihelion perpendicular plane passing polar distance pole position projection radius refraction represented revolution revolve right angles right ascension satellite screw sector semidiameter side sidereal sidereal clock sine sphere spherical triangle star's station subtended subtracted supposed surface tangent transit telescope true variation vertical wire zenith distance zero
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