Outlines of AstronomyBlanchard & Lea, 1856 - 557 стор. |
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Сторінка 60
... precisely meets the case pro- posed , but requires somewhat more thought for its clear apprehension than can perhaps be expected from a beginner : PROP .-- If two bodies , A and B , be in motion independently of each other , the motion ...
... precisely meets the case pro- posed , but requires somewhat more thought for its clear apprehension than can perhaps be expected from a beginner : PROP .-- If two bodies , A and B , be in motion independently of each other , the motion ...
Сторінка 79
... precisely equidistant , should be placed in reality at unequal intervals , —and a hundred other things of the same sort . These are not mere speculative sources of error , but practical annoyances , which every observer has to contend ...
... precisely equidistant , should be placed in reality at unequal intervals , —and a hundred other things of the same sort . These are not mere speculative sources of error , but practical annoyances , which every observer has to contend ...
Сторінка 83
... however , noticed , for the convenience of readers who may use sucn in struments without going farther into the arcana of practical astronomy . difficulty . In fact , it is a case precisely ILLUSTRATION BY EXAMPLES . - REFRACTION . 83.
... however , noticed , for the convenience of readers who may use sucn in struments without going farther into the arcana of practical astronomy . difficulty . In fact , it is a case precisely ILLUSTRATION BY EXAMPLES . - REFRACTION . 83.
Сторінка 84
Sir John Frederick William Herschel. difficulty . In fact , it is a case precisely analogous to what we have already noticed ( art . 47 ) , of the apparent distortion of the sun near the horizon , only on a larger scale , and traced up ...
Sir John Frederick William Herschel. difficulty . In fact , it is a case precisely analogous to what we have already noticed ( art . 47 ) , of the apparent distortion of the sun near the horizon , only on a larger scale , and traced up ...
Сторінка 91
... precisely horizontal , by levelling it with a level made to rest on the pivots . By the latter adjustment the axis is brought precisely into the east and west directions , the criterion of which is furnished by the observations ...
... precisely horizontal , by levelling it with a level made to rest on the pivots . By the latter adjustment the axis is brought precisely into the east and west directions , the criterion of which is furnished by the observations ...
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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