Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка 40
... mean state , the amount of refraction is greater than its mean amount ; when lower , less ; and , 6thly . That in one and the same state of the barometer the refrac- tion is greater , the colder the air . The variation , owing to these ...
... mean state , the amount of refraction is greater than its mean amount ; when lower , less ; and , 6thly . That in one and the same state of the barometer the refrac- tion is greater , the colder the air . The variation , owing to these ...
Сторінка 44
... means of judging of their distances from him , would refer them , in the directions in which they were seen from his station , to the concave sur- face of an imaginary sphere , having his eye for a centre , and its surface at some vast ...
... means of judging of their distances from him , would refer them , in the directions in which they were seen from his station , to the concave sur- face of an imaginary sphere , having his eye for a centre , and its surface at some vast ...
Сторінка 80
... mean or average of the results obtained , this class of errors may be so far subdued , by setting them to destroy ... means of detection of all mechanical defects which elude by their minuteness every other mode of detection . What the ...
... mean or average of the results obtained , this class of errors may be so far subdued , by setting them to destroy ... means of detection of all mechanical defects which elude by their minuteness every other mode of detection . What the ...
Сторінка 82
... means of destroying and eliminating altogether the influence of such imperfections , by so arranging his observations , that it shall affect their results in oppo- site ways , and that its influence shall thus disappear from their mean ...
... means of destroying and eliminating altogether the influence of such imperfections , by so arranging his observations , that it shall affect their results in oppo- site ways , and that its influence shall thus disappear from their mean ...
Сторінка 85
... mean length of the solar day to the mean or average height of water in a harbour , or the general level of the sea unagitated by tide or waves . The great annual fluctuation above noticed may be compared to the daily 1 This is an ...
... mean length of the solar day to the mean or average height of water in a harbour , or the general level of the sea unagitated by tide or waves . The great annual fluctuation above noticed may be compared to the daily 1 This is an ...
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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