Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page 6
... difference is that of pioneering a road through an untraversed country and advancing at ease along a broad and beaten highway ; that is to say , if we are determined to make ourselves distinctly understood , and will appeal to reason at ...
... difference is that of pioneering a road through an untraversed country and advancing at ease along a broad and beaten highway ; that is to say , if we are determined to make ourselves distinctly understood , and will appeal to reason at ...
Page 34
... difference of level , accompanied , as it must be , with a difference of den- sity in the aërial strata , must also have , corresponding to it , a certain amount of refraction ; less , indeed , than what wou'd be produced by the whole ...
... difference of level , accompanied , as it must be , with a difference of den- sity in the aërial strata , must also have , corresponding to it , a certain amount of refraction ; less , indeed , than what wou'd be produced by the whole ...
Page 39
... difference will be in his view of the tree itself , of which , in the former case , he will see every part , but , in the latter , only that portion of it which remains constantly opposite to him , and immediately under his eye . ( 53 ...
... difference will be in his view of the tree itself , of which , in the former case , he will see every part , but , in the latter , only that portion of it which remains constantly opposite to him , and immediately under his eye . ( 53 ...
Page 50
... difference of angular position of P , with respect to the invariable direction A B D , when viewed from A and from B , is the difference of the two angles DBP and DAP ; now , D B P being the exterior angle of the triangle A B P , is ...
... difference of angular position of P , with respect to the invariable direction A B D , when viewed from A and from B , is the difference of the two angles DBP and DAP ; now , D B P being the exterior angle of the triangle A B P , is ...
Page 52
... difference of the results , of his change of distance from them arising from his change of place , although that difference may be so small as to produce no change in their general aspect to his unassisted sight . This is one of the ...
... difference of the results , of his change of distance from them arising from his change of place , although that difference may be so small as to produce no change in their general aspect to his unassisted sight . This is one of the ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical attraction axis bright calculation celestial circle comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere 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 perturbations phænomena planet planetary pole portion position precession precisely proper motions proportion recede recess reckoned refraction remarkable render respect result revolution revolving right ascension ring 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