Outlines of astronomy |
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Page 5
... exact inquiry , without which no man can ever make such advances in this or any other of the higher departments of science as can entitle him to form an independent opinion on any subject of discussion within their range . It is not ...
... exact inquiry , without which no man can ever make such advances in this or any other of the higher departments of science as can entitle him to form an independent opinion on any subject of discussion within their range . It is not ...
Page 22
... exact horizontal interval a Db , by measurement ; then it is clear that D , the visible horizon of both , will lie just half - way between them , and if we sup- pose a Db to be the sphere of the earth , and C its centre in the figure C ...
... exact horizontal interval a Db , by measurement ; then it is clear that D , the visible horizon of both , will lie just half - way between them , and if we sup- pose a Db to be the sphere of the earth , and C its centre in the figure C ...
Page 29
... exact estimation of the amount of atmospheric refraction , or the strict determination of the angle SA s , by which a celestial object at any assigned altitude , H A S , is raised in appearance above its true place , is , unfortunately ...
... exact estimation of the amount of atmospheric refraction , or the strict determination of the angle SA s , by which a celestial object at any assigned altitude , H A S , is raised in appearance above its true place , is , unfortunately ...
Page 48
... exact correspondence with its near proximity . A similar remark applies to the south pole of the earth , which , however , is more unap- proachable , or , at least , has been less nearly approached , than the north . ( 67. ) The above ...
... exact correspondence with its near proximity . A similar remark applies to the south pole of the earth , which , however , is more unap- proachable , or , at least , has been less nearly approached , than the north . ( 67. ) The above ...
Page 51
... in its circumference measure with a sextant or other more exact instrument adapted for the purpose , the angles PAQ , PBQ , PCQ , sub- tended at those stations by two well - defined points K 2 DISTANCE OF THE STARS IMMENSE . 51.
... in its circumference measure with a sextant or other more exact instrument adapted for the purpose , the angles PAQ , PBQ , PCQ , sub- tended at those stations by two well - defined points K 2 DISTANCE OF THE STARS IMMENSE . 51.
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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 Edition effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Julian period 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 proper motions proportion recede reckoned 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 vols whole zenith