Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 sider |
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Side 62
... Equinox , and the point in the same circle to which it is referred by the circle of declination passing through it . Or it is the angle included between two hour circles , one of which passes through the vernal equinox ( and is called ...
... Equinox , and the point in the same circle to which it is referred by the circle of declination passing through it . Or it is the angle included between two hour circles , one of which passes through the vernal equinox ( and is called ...
Side 63
... equinox , and are estimated either in degrees , minutes , and seconds , as in the case of terrestrial longitudes , from 0 ° to 360 ° , which completes the circle ; or , in time , in hours , minutes , and seconds , from Oh . to 24h . The ...
... equinox , and are estimated either in degrees , minutes , and seconds , as in the case of terrestrial longitudes , from 0 ° to 360 ° , which completes the circle ; or , in time , in hours , minutes , and seconds , from Oh . to 24h . The ...
Side 65
... , a great circle perpen- dicular to Pp , will be the equinoctial ; and if Y represent the equinox , T T will be the right ascension , T S the declination , F and P S the polar distance of any star or TERMINOLOGY . 65.
... , a great circle perpen- dicular to Pp , will be the equinoctial ; and if Y represent the equinox , T T will be the right ascension , T S the declination , F and P S the polar distance of any star or TERMINOLOGY . 65.
Side 154
... equinox , is on the me- ridian of his station . This is the epoch of his sidereal time ; which is , therefore , entirely a local reckoning . It gives no information to say that an event happened at such and such an hour of sidereal time ...
... equinox , is on the me- ridian of his station . This is the epoch of his sidereal time ; which is , therefore , entirely a local reckoning . It gives no information to say that an event happened at such and such an hour of sidereal time ...
Side 155
... equinox , and by noting the times of their passage in succession by his clock he knows when the equinox passed . At that moment his clock ought to have marked 0h 0m 0 ° ; and if it did not , he knows and can correct its error , and by ...
... equinox , and by noting the times of their passage in succession by his clock he knows when the equinox passed . At that moment his clock ought to have marked 0h 0m 0 ° ; and if it did not , he knows and can correct its error , and by ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Uten tilgangsbegrensning - 1851 |
Vanlige uttrykk og setninger
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
Populære avsnitt
Side 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.