Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка xi
... Refraction . Twilight . Appear- ances resulting from diurnal motion . From change of station in general . Parallactic motions . Terrestrial parallax . That of the stars insensible . First step towards forming an idea of the distance of ...
... Refraction . Twilight . Appear- ances resulting from diurnal motion . From change of station in general . Parallactic motions . Terrestrial parallax . That of the stars insensible . First step towards forming an idea of the distance of ...
Сторінка xii
... Refraction . Parallax . Summary view of the uranographical corrections ..... 161 CHAPTER VI . OF THE SUN'S MOTION . Apparent motion of the sun not uniform . Its apparent diameter also variable . Variation of its distance concluded . Its ...
... Refraction . Parallax . Summary view of the uranographical corrections ..... 161 CHAPTER VI . OF THE SUN'S MOTION . Apparent motion of the sun not uniform . Its apparent diameter also variable . Variation of its distance concluded . Its ...
Сторінка 24
... REFRACTION . FROM DIURNAL MOTION . - - PARALLACTIC MOTIONS . SHAPE AND THE ATMO- APPEARANCES RESULTING FROM CHANGE OF STATION IN GENERAL . TERRESTRIAL PARALLAX . THAT OF - THE STARS INSENSIBLE . FIRST STEP TOWARDS FORMING AN IDEA OF THE ...
... REFRACTION . FROM DIURNAL MOTION . - - PARALLACTIC MOTIONS . SHAPE AND THE ATMO- APPEARANCES RESULTING FROM CHANGE OF STATION IN GENERAL . TERRESTRIAL PARALLAX . THAT OF - THE STARS INSENSIBLE . FIRST STEP TOWARDS FORMING AN IDEA OF THE ...
Сторінка 30
... refraction in the air below M , of which more hereafter , and which always tends , in some degree , to increase that angle , or render it more obtuse , this is the angle measured by the dip sector . Now , it is evident , 1st , that as ...
... refraction in the air below M , of which more hereafter , and which always tends , in some degree , to increase that angle , or render it more obtuse , this is the angle measured by the dip sector . Now , it is evident , 1st , that as ...
Сторінка 32
... refraction , by which we are enabled to see in some small degree round the interposed segment ( as will be here- after explained ) , this would be a tolerably good method of ascertaining it . Suppose A and B to be two eminences , whose ...
... refraction , by which we are enabled to see in some small degree round the interposed segment ( as will be here- after explained ) , this would be a tolerably good method of ascertaining it . Suppose A and B to be two eminences , whose ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
altitude amount angle angular appear apsides ascertained astronomers 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 effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric horizon inclination increase 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 perpendicular perturbations planet planetary pole portion position precession proper motions proportion recede recess reckoned refraction remarkable render respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose syzygies tangential force telescope tion Uranus variation velocity visible whole zenith