Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 42
... POLE , which appears be the common centre of all their motions , and which alone , in the whole heavens , may be considered immoveable . Not that this point is marked by any star . It is a purely imagi- nary centre ; but there is near ...
... POLE , which appears be the common centre of all their motions , and which alone , in the whole heavens , may be considered immoveable . Not that this point is marked by any star . It is a purely imagi- nary centre ; but there is near ...
Сторінка 43
... pole . In short , he will perceive that the whole assemblage of stars visible at once , or in succession , in the heavens , may be regarded as one great constellation , which seems to revolve with a uniform motion , as if it formed one ...
... pole . In short , he will perceive that the whole assemblage of stars visible at once , or in succession , in the heavens , may be regarded as one great constellation , which seems to revolve with a uniform motion , as if it formed one ...
Сторінка 44
... pole above his horizon , in which the stars never set , so there is a corresponding segment , about which the smaller circles of the more southern stars are described , in which they never rise . The stars which border upon the extreme ...
... pole above his horizon , in which the stars never set , so there is a corresponding segment , about which the smaller circles of the more southern stars are described , in which they never rise . The stars which border upon the extreme ...
Сторінка 45
... pole , perpetually above it . " Hic vertex nobis semper sublimis ; at illum Sub pedibus nox atra videt , manesque profundi . " — VIRGIL . One pole rides high , one , plunged beneath the main , Seeks the deep night , and Pluto's dusky ...
... pole , perpetually above it . " Hic vertex nobis semper sublimis ; at illum Sub pedibus nox atra videt , manesque profundi . " — VIRGIL . One pole rides high , one , plunged beneath the main , Seeks the deep night , and Pluto's dusky ...
Сторінка 46
... pole of the heavens will become elevated above his horizon , and the northern will sink below it ; and the more , the farther he advances southwards ; and when arrived at a station as far to the south of the equator as that from which ...
... pole of the heavens will become elevated above his horizon , and the northern will sink below it ; and the more , the farther he advances southwards ; and when arrived at a station as far to the south of the equator as that from which ...
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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.