Outlines of Astronomy |
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Page 19
... corresponding to each , a glance at which will explain our meaning ; or , limiting ourselves to the larger and more distinct , MNOPQ , let the reader imagine n N M , MQq to be the two legs of a ruler jointed at M , and kept extended by ...
... corresponding to each , a glance at which will explain our meaning ; or , limiting ourselves to the larger and more distinct , MNOPQ , let the reader imagine n N M , MQq to be the two legs of a ruler jointed at M , and kept extended by ...
Page 30
... corresponding degree of uncertainty into the determination of the amount of refraction , which affects , to a certain appretiable extent , our knowledge of several of the most important data of astronomy . The uncertainty thus induced ...
... corresponding degree of uncertainty into the determination of the amount of refraction , which affects , to a certain appretiable extent , our knowledge of several of the most important data of astronomy . The uncertainty thus induced ...
Page 34
... a difference of den- sity in the aërial strata , must also have , corresponding to it , a certain amount of refraction ; less , indeed , than what would be produced by the whole atmosphere , but still often 34 OUTLINES OF ASTRONOMY .
... a difference of den- sity in the aërial strata , must also have , corresponding to it , a certain amount of refraction ; less , indeed , than what would be produced by the whole atmosphere , but still often 34 OUTLINES OF ASTRONOMY .
Page 41
... corresponding change of a very obvious kind in the apparent motions of the stars ; which , again , history decidedly declares them not to have undergone . - - ( 58. ) But , before we proceed to examine more in detail how the hypothesis ...
... corresponding change of a very obvious kind in the apparent motions of the stars ; which , again , history decidedly declares them not to have undergone . - - ( 58. ) But , before we proceed to examine more in detail how the hypothesis ...
Page 45
... 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 circumference of this segment just graze the southern point of his ...
... 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 circumference of this segment just graze the southern point of his ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical atmosphere attraction axis bright calculation celestial circle coincidence comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian micrometrical moon moon's nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena phænomenon planet planetary pole portion position precession precisely proper motion proportion recede recess refraction remarkable respect result revolution revolving right ascension rotation round satellites Saturn seen sidereal sidereal day situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible whole zenith