Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 sider |
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Side v
... errors which , to my regret , subsisted in the former volume , but to remodel it altogether ( though in complete accordance with its original design as a work of ex- planation ) ; to introduce much new matter in the earlier portions of ...
... errors which , to my regret , subsisted in the former volume , but to remodel it altogether ( though in complete accordance with its original design as a work of ex- planation ) ; to introduce much new matter in the earlier portions of ...
Side 1
... errors . 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 something of an effort and a resolve , for the ...
... errors . 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 something of an effort and a resolve , for the ...
Side 34
... 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 alti ...
... 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 alti ...
Side 75
... error can cer- tainly be perceived and distinctly measured , that he can satisfy himself whether any theory offers ... errors of work- manship , arising from unsteadiness of hand or imperfection of tools , but those inaccuracies which ...
... error can cer- tainly be perceived and distinctly measured , that he can satisfy himself whether any theory offers ... errors of work- manship , arising from unsteadiness of hand or imperfection of tools , but those inaccuracies which ...
Side 77
... errors may arise in any in- strumental determination , we shall find them chiefly reducible to three principal heads : - ( 133. ) 1st , External or incidental causes of error ; com- prehending such as depend on external , uncontrollable ...
... errors may arise in any in- strumental determination , we shall find them chiefly reducible to three principal heads : - ( 133. ) 1st , External or incidental causes of error ; com- prehending such as depend on external , uncontrollable ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Uten tilgangsbegrensning - 1851 |
Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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.