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 |
From inside the book
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Page xv
... moved in one of the planes , the two other planes continuing parallel to their original positions - 185. Investigation , from the co - ordinates of three points in a given plane , of the inclination of that plane to one of the co ...
... moved in one of the planes , the two other planes continuing parallel to their original positions - 185. Investigation , from the co - ordinates of three points in a given plane , of the inclination of that plane to one of the co ...
Page 3
... moved eastward about the earth . The moon is observed to change her place in like manner ; for if on any night her distance eastward from some star be remarked , on the following night the dis- tance in that direction will be sensibly ...
... moved eastward about the earth . The moon is observed to change her place in like manner ; for if on any night her distance eastward from some star be remarked , on the following night the dis- tance in that direction will be sensibly ...
Page 62
... moved till the object , or the space between two objects , is comprehended between them , the angle subtended at the eye by such object or space is ascertained by a scale ab in the field of the telescope : one revolution of each screw ...
... moved till the object , or the space between two objects , is comprehended between them , the angle subtended at the eye by such object or space is ascertained by a scale ab in the field of the telescope : one revolution of each screw ...
Page 64
... moved up along the scale till it coincides with the next divi- sion - line on the circle ; then the number of revolutions , and the part of a revolution which the screw has made must , when reduced as above , be added to , or subtracted ...
... moved up along the scale till it coincides with the next divi- sion - line on the circle ; then the number of revolutions , and the part of a revolution which the screw has made must , when reduced as above , be added to , or subtracted ...
Page 65
... moved a small way in azimuth , in order that the optical axis of the telescope , ( the line joining the centres of all the lenses , ) may be brought accurately into the plane of the meridian . 82. At the focus of the object glass are ...
... moved a small way in azimuth , in order that the optical axis of the telescope , ( the line joining the centres of all the lenses , ) may be brought accurately into the plane of the meridian . 82. At the focus of the object glass are ...
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Other editions - View all
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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