Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page 8
... evident that our aim is not to offer to the public a technical treatise , in which the student of practical or theoretical astronomy shall find consigned the minute description of methods of observation , or the formulæ he requires ...
... evident that our aim is not to offer to the public a technical treatise , in which the student of practical or theoretical astronomy shall find consigned the minute description of methods of observation , or the formulæ he requires ...
Page 13
... evident , that , to form any just notions of the arrangement , in space , of a number of objects which we can- not approach and examine , but of which all the information we can gain is by sitting still and watching their evolutions ...
... evident , that , to form any just notions of the arrangement , in space , of a number of objects which we can- not approach and examine , but of which all the information we can gain is by sitting still and watching their evolutions ...
Page 14
... evident , subsist undetected by us . There is no peculiar sensation which advertises us that we are in motion . We perceive jerks , or shocks , it is true , because these are sudden changes of motion , produced , as the laws of ...
... evident , subsist undetected by us . There is no peculiar sensation which advertises us that we are in motion . We perceive jerks , or shocks , it is true , because these are sudden changes of motion , produced , as the laws of ...
Page 18
... evident , 1st , that as the point M is more elevated above m , the point immediately below it on the sphere , the visible area , i . e . the spherical segment or slice NOPQ , increases ; 2dly , that the distance . of the visible horizon ...
... evident , 1st , that as the point M is more elevated above m , the point immediately below it on the sphere , the visible area , i . e . the spherical segment or slice NOPQ , increases ; 2dly , that the distance . of the visible horizon ...
Page 34
... evident , that whenever a ray passes obliquely from a higher level to a lower one , or vice versâ , its course is not rectilinear , but concave downwards ; and of course any object seen by means of such aray , must appear deviated from ...
... evident , that whenever a ray passes obliquely from a higher level to a lower one , or vice versâ , its course is not rectilinear , but concave downwards ; and of course any object seen by means of such aray , must appear deviated from ...
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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