Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка xvi
... calculating the days elapsed between given dates . Equinoctial time ......... .................... ...... 523 APPENDIX . I. Lists of Northern and Southern Stars , with their approximate Magni- tudes , on the Vulgar and Photometric ...
... calculating the days elapsed between given dates . Equinoctial time ......... .................... ...... 523 APPENDIX . I. Lists of Northern and Southern Stars , with their approximate Magni- tudes , on the Vulgar and Photometric ...
Сторінка 18
... calculations have called up , and exhausting his imagination and the powers of his language to devise similes and metaphors illustrative of the immensity of the scale on which his universe is constructed , he shrinks back to his native ...
... calculations have called up , and exhausting his imagination and the powers of his language to devise similes and metaphors illustrative of the immensity of the scale on which his universe is constructed , he shrinks back to his native ...
Сторінка 35
... calculation , however , founded on our experimental knowledge of the pro- perties of air , and the mechanical laws which regulate its dilatation and compression , is sufficient to show that , at an altitude above the surface of the ...
... calculation , however , founded on our experimental knowledge of the pro- perties of air , and the mechanical laws which regulate its dilatation and compression , is sufficient to show that , at an altitude above the surface of the ...
Сторінка 39
... destined to furnish these useful aids to calculation . It is , how- 1 From an Arabic word of this signification . See this term technically defined in Chap . II . ever , desirable that he should bear in mind the REFRACTION . 39.
... destined to furnish these useful aids to calculation . It is , how- 1 From an Arabic word of this signification . See this term technically defined in Chap . II . ever , desirable that he should bear in mind the REFRACTION . 39.
Сторінка 80
... calculation and due allowance , they actually vitiate , to their full extent , the results of any observations in which they subsist . Being , however , in their nature casual and accidental , their effects necessarily lie sometimes one ...
... calculation and due allowance , they actually vitiate , to their full extent , the results of any observations in which they subsist . Being , however , in their nature casual and accidental , their effects necessarily lie sometimes one ...
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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