Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка vii
... errors which , to my regret , subsisted in the former volume , but to remodel it alto- gether ( though in complete accordance with its original design as a work of explanation ) ; to introduce much new matter in the earlier portions of ...
... errors which , to my regret , subsisted in the former volume , but to remodel it alto- gether ( though in complete accordance with its original design as a work of explanation ) ; to introduce much new matter in the earlier portions of ...
Сторінка 17
... errors . As a first preparation , therefore , for the course he is about to commence , he must loosen his hold on all crude and hastily adopted notions , and must strengthen himself , by some- thing of an effort and a resolve , for the ...
... errors . As a first preparation , therefore , for the course he is about to commence , he must loosen his hold on all crude and hastily adopted notions , and must strengthen himself , by some- thing of an effort and a resolve , for the ...
Сторінка 43
... error , without , however , dispelling our illusion . By this we learn , that the sun , when just on the horizon , subtends at our eyes almost exactly the same , and the moon a materially less angle , than when seen at a great altitude ...
... error , without , however , dispelling our illusion . By this we learn , that the sun , when just on the horizon , subtends at our eyes almost exactly the same , and the moon a materially less angle , than when seen at a great altitude ...
Сторінка 77
... error can certainly be perceived and distinctly measured , that he can satisfy himself whether any theory offers so ... errors of workmanship , arising from unsteadiness of hand or imperfection of tools , but those inaccuracies which ...
... error can certainly be perceived and distinctly measured , that he can satisfy himself whether any theory offers so ... errors of workmanship , arising from unsteadiness of hand or imperfection of tools , but those inaccuracies which ...
Сторінка 78
... errors may arise in any instrumental determination , we shall find them chiefly reducible to three principal heads : ( 133. ) 1st , External or incidental causes of error ; comprehending such as depend on external , uncontrollable ...
... errors may arise in any instrumental determination , we shall find them chiefly reducible to three principal heads : ( 133. ) 1st , External or incidental causes of error ; comprehending such as depend on external , uncontrollable ...
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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