Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 23
... mass of the atmosphere : that at 10,600 feet of perpendicular elevation ( which is rather less than that of the summit of Etna * ) we have ascended * The height of Ætna above the Mediterranean ( as it results from a barome- through ...
... mass of the atmosphere : that at 10,600 feet of perpendicular elevation ( which is rather less than that of the summit of Etna * ) we have ascended * The height of Ætna above the Mediterranean ( as it results from a barome- through ...
Сторінка 25
... 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 , and which is not more in ...
... 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 , and which is not more in ...
Сторінка 33
... masses of air of very unequal temperatures , produces partial reflections and refractions at their common boundaries , by which some por- tion of the light is turned aside from the direct course , and diverted to the purposes of general ...
... masses of air of very unequal temperatures , produces partial reflections and refractions at their common boundaries , by which some por- tion of the light is turned aside from the direct course , and diverted to the purposes of general ...
Сторінка 35
... mass of the earth , we shall have little hesitation in admitting those luminaries which people and adorn the sky , and which , while they obviously form no part of the earth , and receive no support from it , are yet not borne along at ...
... mass of the earth , we shall have little hesitation in admitting those luminaries which people and adorn the sky , and which , while they obviously form no part of the earth , and receive no support from it , are yet not borne along at ...
Сторінка 36
... mass on which he stands , from seeing into all that portion of space which is below him , or to see which he must look in any degree downwards . It is true that , if his place of observation be at a great elevation , the dip of the ...
... mass on which he stands , from seeing into all that portion of space which is below him , or to see which he must look in any degree downwards . It is true that , if his place of observation be at a great elevation , the dip of the ...
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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.