Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 pages |
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Page 58
... reckoned in degrees , minutes , and seconds , from 0 up to 90 ° , and northwards or southwards ac- cording to the ... reckoned north or south , so longitude is usually said to be reckoned west or cast . It would add greatly , however ...
... reckoned in degrees , minutes , and seconds , from 0 up to 90 ° , and northwards or southwards ac- cording to the ... reckoned north or south , so longitude is usually said to be reckoned west or cast . It would add greatly , however ...
Page 59
... reckoned inva- riably westward from their origin round the whole circle from 0 to 360 ° . Thus , the longitude of Paris is , in common parlance , either 2 ° 20 ′ 22 ′′ east , or 357 ° 39 ′ 38 ′′ west of Greenwich . But , in the sense in ...
... reckoned inva- riably westward from their origin round the whole circle from 0 to 360 ° . Thus , the longitude of Paris is , in common parlance , either 2 ° 20 ′ 22 ′′ east , or 357 ° 39 ′ 38 ′′ west of Greenwich . But , in the sense in ...
Page 61
... reckoned eastwards or westwards , from the north or south point , and is usually so reckoned only to 180 ° either way . But to avoid confusion , and to ... reckoned positive , considering the eastward reckoning as negative TERMINOLOGY . 61.
... reckoned eastwards or westwards , from the north or south point , and is usually so reckoned only to 180 ° either way . But to avoid confusion , and to ... reckoned positive , considering the eastward reckoning as negative TERMINOLOGY . 61.
Page 62
John Frederick William Herschel. always reckoned positive , considering the eastward reckoning as negative . ( 104. ) DEF . 21. The altitude of a heavenly body is its ap- parent angular elevation above the horizon . It is the com ...
John Frederick William Herschel. always reckoned positive , considering the eastward reckoning as negative . ( 104. ) DEF . 21. The altitude of a heavenly body is its ap- parent angular elevation above the horizon . It is the com ...
Page 63
... reckoning of longitudes . ( Art . 91. ) ( 110. ) Sidereal time is reckoned by the diurnal motion of the stars , or rather of that point in the equinoctial from which right ascensions are reckoned . This point may be considered as a star ...
... reckoning of longitudes . ( Art . 91. ) ( 110. ) Sidereal time is reckoned by the diurnal motion of the stars , or rather of that point in the equinoctial from which right ascensions are reckoned . This point may be considered as a star ...
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angle angular appear apsides ascertained astronomical 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 Edition effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe heavens heliocentric horizon inclination 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 planet planetary pole portion position Post 8vo precession proper motions proportion recede recess reckoned refraction respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole Woodcuts zenith
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Page 674 - A Dictionary of Science, Literature, and Art : Comprising the History, Description, and Scientific Principles of every Branch of Human Knowledge ; with the Derivation and Definition of all the Terms in General Use. Edited by WT BRANDE, FRSL and E.