Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка 19
... described , to impress the student with a sense of its truth , without either the formality of demon- stration or the superfluous tedium of eulogy , calling to mind that impor- tant remark of Bacon : " Theoriarum vires , arcta et quasi ...
... described , to impress the student with a sense of its truth , without either the formality of demon- stration or the superfluous tedium of eulogy , calling to mind that impor- tant remark of Bacon : " Theoriarum vires , arcta et quasi ...
Сторінка 38
... described by the refracted ray is concave down- wards , the tangent A s will lie above A S , the unrefracted ray : conse- quently the object S will appear more elevated above the horizon A H , when seen through the refracting atmosphere ...
... described by the refracted ray is concave down- wards , the tangent A s will lie above A S , the unrefracted ray : conse- quently the object S will appear more elevated above the horizon A H , when seen through the refracting atmosphere ...
Сторінка 49
... described are not of the same magnitude for all the stars ; and that those described by different stars differ greatly in respect of the parts of them which lie above the horizon . Some , which lie towards the quarter of the horizon ...
... described are not of the same magnitude for all the stars ; and that those described by different stars differ greatly in respect of the parts of them which lie above the horizon . Some , which lie towards the quarter of the horizon ...
Сторінка 50
... described in the last article , become actually inverted with respect to the horizon , while , on the other hand , they always turn the same points towards the pole . In short , he will perceive that the whole assemblage of stars ...
... described in the last article , become actually inverted with respect to the horizon , while , on the other hand , they always turn the same points towards the pole . In short , he will perceive that the whole assemblage of stars ...
Сторінка 51
... described , in which they never rise . The stars which border upon the extreme circumference of this segment just graze the southern point of his hori- zon , and show themselves for a few moments above it , precisely as those near the ...
... described , in which they never rise . The stars which border upon the extreme circumference of this segment just graze the southern point of his hori- zon , and show themselves for a few moments above it , precisely as those near the ...
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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