Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 69
... regarded in this its true light of a perspective representation or picture , and it even re- quires an effort of imagination to conceive them in their true relations , as at vastly different distances , one behind the other , * An ...
... regarded in this its true light of a perspective representation or picture , and it even re- quires an effort of imagination to conceive them in their true relations , as at vastly different distances , one behind the other , * An ...
Сторінка 75
... regarded as the most refined of the mechanical arts , and that in which the nearest approach to geometrical precision is re- quired , and has been attained . It may be thought an easy thing , by one unacquainted with the niceties ...
... regarded as the most refined of the mechanical arts , and that in which the nearest approach to geometrical precision is re- quired , and has been attained . It may be thought an easy thing , by one unacquainted with the niceties ...
Сторінка 83
... regarded as a local irregularity , and , as such , neglected , or slurred over . As soon , however , as the diurnal paths of the stars were attempted to be traced by in- struments , even of the coarsest kind , it became evident that the ...
... regarded as a local irregularity , and , as such , neglected , or slurred over . As soon , however , as the diurnal paths of the stars were attempted to be traced by in- struments , even of the coarsest kind , it became evident that the ...
Сторінка 126
... regarded as protuberant above the ocean , and broken into the various forms of mountain , table land , and valley ; neither should the form of the bed of the ocean , regarded as a continuation of the surface of the land beneath the ...
... regarded as protuberant above the ocean , and broken into the various forms of mountain , table land , and valley ; neither should the form of the bed of the ocean , regarded as a continuation of the surface of the land beneath the ...
Сторінка 133
... regarded as arcs of circles of one degree each , described about x , y , z , as centres . These are what in geometry are called centres of curvature , and the radii x N or x A , y B or y D , z G or z E , represent radii of curvature ...
... regarded as arcs of circles of one degree each , described about x , y , z , as centres . These are what in geometry are called centres of curvature , and the radii x N or x A , y B or y D , z G or z E , represent radii of curvature ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
angle angular appear apsides ascertained astronomical axis bright calculation celestial centre circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic Edition effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe heavens heliocentric horizon inclination inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian moon moon's motion nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations planet planetary pole portion position Post 8vo precession proper motions proportion recede recess reckoned refraction respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole Woodcuts zenith
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Сторінка 674 - A Dictionary of Science, Literature, and Art : Comprising the History, Description, and Scientific Principles of every Branch of Human Knowledge ; with the Derivation and Definition of all the Terms in General Use. Edited by WT BRANDE, FRSL and E.