Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 17
... horizon ; and as this tangent sweeps round M , and comes successively into the positions MO o , MPp , M Qq , the ... horizon or boundary of our view from the eye , viz . the line MN , increases ; and , 0 THE HORIZON AND ITS DIP . 17.
... horizon ; and as this tangent sweeps round M , and comes successively into the positions MO o , MPp , M Qq , the ... horizon or boundary of our view from the eye , viz . the line MN , increases ; and , 0 THE HORIZON AND ITS DIP . 17.
Сторінка 18
... horizon , & c . corresponding to each , a glance at which will explain our meaning ; or , limiting ourselves to the larger and more distinct , MNOPQ , let the reader imagine n N M , MQ7 to be the two legs of a ruler jointed at M , and ...
... horizon , & c . corresponding to each , a glance at which will explain our meaning ; or , limiting ourselves to the larger and more distinct , MNOPQ , let the reader imagine n N M , MQ7 to be the two legs of a ruler jointed at M , and ...
Сторінка 19
... horizon , or sea - offing , is a consequence of the curvature of the surface , and does not arise from the inability of the eye to follow objects to a greater distance , or from at- mospheric indistinctness . It will be worth while to ...
... horizon , or sea - offing , is a consequence of the curvature of the surface , and does not arise from the inability of the eye to follow objects to a greater distance , or from at- mospheric indistinctness . It will be worth while to ...
Сторінка 20
... horizon is at D , the hull comes again in sight ; and , when he descends again , he loses D it . The ship still receding , the lower sails seem to sink below the water , as at d , and at length the whole disappears : while yet the ...
... horizon is at D , the hull comes again in sight ; and , when he descends again , he loses D it . The ship still receding , the lower sails seem to sink below the water , as at d , and at length the whole disappears : while yet the ...
Сторінка 21
... horizon of both , will lie just half - way between them , and if we sup- pose a Db to be the sphere of the earth , and C its centre in the figure C D b B , we know Db , the length of the arch C of the circle between D and b , — viz ...
... horizon of both , will lie just half - way between them , and if we sup- pose a Db to be the sphere of the earth , and C its centre in the figure C D b B , we know Db , the length of the arch C of the circle between D and b , — viz ...
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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.