Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка 32
... interval a Db , by measure- ment ; then it is clear that D , the visible horizon of both , will lie just half - way between them , and if we suppose a Db to be the sphere of the earth , and C its centre in the figure CD6B , we know Db ...
... interval a Db , by measure- ment ; then it is clear that D , the visible horizon of both , will lie just half - way between them , and if we suppose a Db to be the sphere of the earth , and C its centre in the figure CD6B , we know Db ...
Сторінка 47
... intervals of time , ad infinitum . ( 55. ) Now , in this we have a lively picture of that grand phenomenon , the most ... interval of twenty - four hours is the first instance we encounter of that great law of periodicity , ' which , as ...
... intervals of time , ad infinitum . ( 55. ) Now , in this we have a lively picture of that grand phenomenon , the most ... interval of twenty - four hours is the first instance we encounter of that great law of periodicity , ' which , as ...
Сторінка 48
... interval of time elapsing between two successive returns of the same star to the same point of the sky ; or , rather , it is demonstrable from astronomical records that no such change has taken place . And with respect to the other ...
... interval of time elapsing between two successive returns of the same star to the same point of the sky ; or , rather , it is demonstrable from astronomical records that no such change has taken place . And with respect to the other ...
Сторінка 49
... interval , as the night advances , he will not fail to perceive that they have changed their places , and advanced , as by a general movement , in a west- ward direction ; those towards the eastern quarter appearing to rise or recede ...
... interval , as the night advances , he will not fail to perceive that they have changed their places , and advanced , as by a general movement , in a west- ward direction ; those towards the eastern quarter appearing to rise or recede ...
Сторінка 52
... interval . In this situation , no part of the heavens is concealed from his successive view . In a night of twelve hours ( supposing such a continuance of darkness possible at the equator ) the whole sphere will have passed in review ...
... interval . In this situation , no part of the heavens is concealed from his successive view . In a night of twelve hours ( supposing such a continuance of darkness possible at the equator ) the whole sphere will have passed in review ...
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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