Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 51
... fact , and conclusions thence deducible , from what we should B hold , were we to rely in all cases on the mere judgment of the eye . To so great a nicety have such observations been carried by the aid of an instrument called a ...
... fact , and conclusions thence deducible , from what we should B hold , were we to rely in all cases on the mere judgment of the eye . To so great a nicety have such observations been carried by the aid of an instrument called a ...
Сторінка 53
... fact prove otherwise . As a postulate , therefore , we shall henceforth regard it ; and as , in the progress of our work , analogies offer themselves in its support from what we ob- serve of other celestial bodies , we shall not fail to ...
... fact prove otherwise . As a postulate , therefore , we shall henceforth regard it ; and as , in the progress of our work , analogies offer themselves in its support from what we ob- serve of other celestial bodies , we shall not fail to ...
Сторінка 83
... fact , it is a case precisely analogous to The principle on which the chief adjustments of two or three of the most useful and common instruments , such as the transit , the equatorial , and the sextant , are performed , are , however ...
... fact , it is a case precisely analogous to The principle on which the chief adjustments of two or three of the most useful and common instruments , such as the transit , the equatorial , and the sextant , are performed , are , however ...
Сторінка 84
... fact , only 23h 56 ' 4.09 " , instead of 24 hours , such hours as our common clocks mark . Here , then , we have already two different days , a sidereal and a solar ; and if , instead of the sun , we observe the moon , we find a third ...
... fact , only 23h 56 ' 4.09 " , instead of 24 hours , such hours as our common clocks mark . Here , then , we have already two different days , a sidereal and a solar ; and if , instead of the sun , we observe the moon , we find a third ...
Сторінка 89
... fact , it is then only the times intervening between the first and the last moments of such long intervals , and such of those periodically recurring events adopted for our points of reckon- ing , as occur within twenty - four hours ...
... fact , it is then only the times intervening between the first and the last moments of such long intervals , and such of those periodically recurring events adopted for our points of reckon- ing , as occur within twenty - four hours ...
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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.