Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка xvi
... greater of them . The zodiacal light . Shooting stars PART IV . OF THE ACCOUNT OF TIME . CHAPTER XVIII . - 591 Natural units of time . Relation of the sidereal to the solar day affected by precession . Incommensurability of the day and ...
... greater of them . The zodiacal light . Shooting stars PART IV . OF THE ACCOUNT OF TIME . CHAPTER XVIII . - 591 Natural units of time . Relation of the sidereal to the solar day affected by precession . Incommensurability of the day and ...
Сторінка 19
... greater distance , or from at- mospheric indistinctness . It will be worth while to pursue the general notion thus acquired into some of its consequences , by which its consistency with observations of a different kind , and on a larger ...
... greater distance , or from at- mospheric indistinctness . It will be worth while to pursue the general notion thus acquired into some of its consequences , by which its consistency with observations of a different kind , and on a larger ...
Сторінка 25
... greater part of the whole mass , the density diminish- ing with extreme rapidity as we recede upwards , till , within a very moderate distance ( such as would be represented by the sixth of an inch on the model we have before spoken of ...
... greater part of the whole mass , the density diminish- ing with extreme rapidity as we recede upwards , till , within a very moderate distance ( such as would be represented by the sixth of an inch on the model we have before spoken of ...
Сторінка 27
... greater and greater refraction in the same direction ; and thus , instead of pur- suing the straight line S d A , it will describe a curve Sdcba , continually more and more concave downwards , and will reach the earth , not at A , but ...
... greater and greater refraction in the same direction ; and thus , instead of pur- suing the straight line S d A , it will describe a curve Sdcba , continually more and more concave downwards , and will reach the earth , not at A , but ...
Сторінка 30
... greater than its mean amount ; when lower , less : and , 6thly . That in one and the same state of the barometer the refraction is greater , the colder the air . The variation , owing to these two causes , from its mean amount ( at temp ...
... greater than its mean amount ; when lower , less : and , 6thly . That in one and the same state of the barometer the refraction is greater , the colder the air . The variation , owing to these two causes , from its mean amount ( at temp ...
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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.