Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 65
... ; ETQ , a great circle perpen- dicular to Pp , will be the equinoctial ; and if Y represent the equinox , T T will be the right ascension , T S the declination , F and P S the polar distance of any star or TERMINOLOGY . 65.
... ; ETQ , a great circle perpen- dicular to Pp , will be the equinoctial ; and if Y represent the equinox , T T will be the right ascension , T S the declination , F and P S the polar distance of any star or TERMINOLOGY . 65.
Сторінка 66
... equinoctial by the hour circle PSTp ; and BSD B.Z S M N p . will be the diurnal circle it will appear to describe about the pole . Again , if we refer it to the horizon by the vertical circle Z S M , OM will be its azimuth , M S its ...
... equinoctial by the hour circle PSTp ; and BSD B.Z S M N p . will be the diurnal circle it will appear to describe about the pole . Again , if we refer it to the horizon by the vertical circle Z S M , OM will be its azimuth , M S its ...
Сторінка 69
... equinoctial , must be conceived as the vanishing circle of a system of planes pa- rallel to the earth's equator , or perpendicular to its axis . The celestial horizon of any spectator is in like manner the vanishing circle of all planes ...
... equinoctial , must be conceived as the vanishing circle of a system of planes pa- rallel to the earth's equator , or perpendicular to its axis . The celestial horizon of any spectator is in like manner the vanishing circle of all planes ...
Сторінка 71
... equinoctial intersects the horizon in the east and west points , and the meridian in a point whose altitude is equal ... equinoctial and meridian is 38 ° 31 ′ 20 ′′ . The north and south poles of the heavens are the poles of the ...
... equinoctial intersects the horizon in the east and west points , and the meridian in a point whose altitude is equal ... equinoctial and meridian is 38 ° 31 ′ 20 ′′ . The north and south poles of the heavens are the poles of the ...
Сторінка 72
... equinoctial opposite to that of the elevated pole . If Z S be so , the ob- ject is below the horizon . In the same triangle the angles are , 1st , Z P S the lower angle ; 2d , PZS ( the supplement of S Z O , which latter is the azimuth ...
... equinoctial opposite to that of the elevated pole . If Z S be so , the ob- ject is below the horizon . In the same triangle the angles are , 1st , Z P S the lower angle ; 2d , PZS ( the supplement of S Z O , which latter is the azimuth ...
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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.