Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 sider |
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Side 7
... seen , as it were , the process of nature passing under his eye in an in- stant of time , and presented as a consecutive whole to his imagination . A familiar parallel , or an illustration drawn from some artificial or natural process ...
... seen , as it were , the process of nature passing under his eye in an in- stant of time , and presented as a consecutive whole to his imagination . A familiar parallel , or an illustration drawn from some artificial or natural process ...
Side 16
... seen ; but from these again - in those few and rare occasions when the transparency of the air will permit the real boundary of the horizon , the true sea - line , to be seen- the very same appearances are witnessed , but with this re ...
... seen ; but from these again - in those few and rare occasions when the transparency of the air will permit the real boundary of the horizon , the true sea - line , to be seen- the very same appearances are witnessed , but with this re ...
Side 19
... seen perfectly well beyond the offing or visible horizon - but not the whole of them . We only see their upper parts . Their bases where they rest on , or rise out of the water , are hid from view by the spherical surface of the sea ...
... seen perfectly well beyond the offing or visible horizon - but not the whole of them . We only see their upper parts . Their bases where they rest on , or rise out of the water , are hid from view by the spherical surface of the sea ...
Side 23
... seen at once by man , was that exposed to the view of MM . Biot and Gay - Lussac , in their celebrated aëronautic expedition to the enormous height of 25,000 feet , or rather less than five miles . To estimate the proportion of the area ...
... seen at once by man , was that exposed to the view of MM . Biot and Gay - Lussac , in their celebrated aëronautic expedition to the enormous height of 25,000 feet , or rather less than five miles . To estimate the proportion of the area ...
Side 28
... seen in the direction which the visual ray has at the instant of arriving at the eye , without regard to what may have been otherwise its course between the object and the eye . Hence the star S will be seen , not in the di- rection AS ...
... seen in the direction which the visual ray has at the instant of arriving at the eye , without regard to what may have been otherwise its course between the object and the eye . Hence the star S will be seen , not in the di- rection AS ...
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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.