Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 81
... arise from sources inherent in the instrument , and unchangeable while it and its adjustments remain unchanged , they are reducible to fixed and ascertainable forms ; each particular defect , whether of structure or adjustment ...
... arise from sources inherent in the instrument , and unchangeable while it and its adjustments remain unchanged , they are reducible to fixed and ascertainable forms ; each particular defect , whether of structure or adjustment ...
Сторінка 82
... arise , in its use , from any assigned deviation , whether in a horizontal or vertical plane , from this precise position . Such inquiries constitute the theory of in- strumental errors ; a theory of the utmost importance to practice ...
... arise , in its use , from any assigned deviation , whether in a horizontal or vertical plane , from this precise position . Such inquiries constitute the theory of in- strumental errors ; a theory of the utmost importance to practice ...
Сторінка 83
... arise from no casual or instrumental cause , it became necessary to seek a natural one ; and refraction readily occurred , to solve the difficulty . In fact , it is a case precisely analogous to The principle on which the chief ...
... arise from no casual or instrumental cause , it became necessary to seek a natural one ; and refraction readily occurred , to solve the difficulty . In fact , it is a case precisely analogous to The principle on which the chief ...
Сторінка 91
... measure . ( 158. ) This application of the telescope may be considered as completely annihilating that part of the error of observa- tion which might otherwise arise from an erroneous estimation of PRINCIPLE OF TELESCOPIC SIGHTS . 91.
... measure . ( 158. ) This application of the telescope may be considered as completely annihilating that part of the error of observa- tion which might otherwise arise from an erroneous estimation of PRINCIPLE OF TELESCOPIC SIGHTS . 91.
Сторінка 92
... arise from any but the very coarsest graduation . In fact , the telescope thus applied becomes , with respect to angular , what the microscope is with respect to linear dimension . By concentrating attention on its smallest parts , and ...
... arise from any but the very coarsest graduation . In fact , the telescope thus applied becomes , with respect to angular , what the microscope is with respect to linear dimension . By concentrating attention on its smallest parts , and ...
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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.