Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
From inside the book
Results 1-5 of 74
Page 46
... equator , at any point of which , indifferently , if he take up his station and recommence his observations , he will find that he has both the centres of diurnal motion in his horizon , occupying op- posite points , the northern Pole ...
... equator , at any point of which , indifferently , if he take up his station and recommence his observations , he will find that he has both the centres of diurnal motion in his horizon , occupying op- posite points , the northern Pole ...
Page 47
... equator ) the whole sphere will have passed in review over him — the whole hemisphere with which he began his night's observation will have been carried down beneath him , and the entire opposite one brought up from below . ( 65. ) If ...
... equator ) the whole sphere will have passed in review over him — the whole hemisphere with which he began his night's observation will have been carried down beneath him , and the entire opposite one brought up from below . ( 65. ) If ...
Page 58
... equator is a great circle on its surface , equidistant from its poles , dividing it into two hemi- spheres a northern and a southern ; in the midst of which are situated the respective poles of the earth of those names . The plane of ...
... equator is a great circle on its surface , equidistant from its poles , dividing it into two hemi- spheres a northern and a southern ; in the midst of which are situated the respective poles of the earth of those names . The plane of ...
Page 59
... equator , measured on its own terrestrial meridian : it is reckoned in degrees , minutes , and seconds , from 0 up to 90 ° , and northwards or southwards ac- cording to the hemisphere the place lies in . Thus , the obser- vatory at ...
... equator , measured on its own terrestrial meridian : it is reckoned in degrees , minutes , and seconds , from 0 up to 90 ° , and northwards or southwards ac- cording to the hemisphere the place lies in . Thus , the obser- vatory at ...
Page 60
... equator , over every point of which respectively , the sun in its diurnal course passes vertically on the 21st of March and the 21st of September in every year . Their latitudes are about 23 ° 28 ′ respectively , north and south . ( 94 ...
... equator , over every point of which respectively , the sun in its diurnal course passes vertically on the 21st of March and the 21st of September in every year . Their latitudes are about 23 ° 28 ′ respectively , north and south . ( 94 ...
Other editions - View all
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