Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 12
... true conclusions respecting the constitution of the universe . ( 15. ) Nor let it be thought strange that we should speak of a motion existing in the earth , unperceived by its in- habitants : we must remember that it is of the earth as ...
... true conclusions respecting the constitution of the universe . ( 15. ) Nor let it be thought strange that we should speak of a motion existing in the earth , unperceived by its in- habitants : we must remember that it is of the earth as ...
Сторінка 13
... true , because these are sudden changes of motion , produced , as the laws of mechanics teach us , by sudden and powerful forces acting during short times ; and these forces , applied to our bodies , are what we feel . When , for ...
... true , because these are sudden changes of motion , produced , as the laws of mechanics teach us , by sudden and powerful forces acting during short times ; and these forces , applied to our bodies , are what we feel . When , for ...
Сторінка 16
... true sea - line , to be seen- the very same appearances are witnessed , but with this re- markable addition , viz . that the angular diameter of the visible area , as measured by the dip sector , is materially less than at a lower level ...
... true sea - line , to be seen- the very same appearances are witnessed , but with this re- markable addition , viz . that the angular diameter of the visible area , as measured by the dip sector , is materially less than at a lower level ...
Сторінка 19
... true , in apparent size , but still the whole is seen down to the water line , till it reaches the visible horizon at B. But as soon as it has passed this distance , not only does the visible portion still continue to diminish in ...
... true , in apparent size , but still the whole is seen down to the water line , till it reaches the visible horizon at B. But as soon as it has passed this distance , not only does the visible portion still continue to diminish in ...
Сторінка 26
... their places , which must be rectified by ascertaining the amount and direction of the displacement so apparently produced on each , before we can come at a knowledge of the true directions in 26 OUTLINES OF ASTRONOMY .
... their places , which must be rectified by ascertaining the amount and direction of the displacement so apparently produced on each , before we can come at a knowledge of the true directions in 26 OUTLINES OF ASTRONOMY .
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
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
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Сторінка 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.