Outlines of astronomy |
From inside the book
Results 1-5 of 100
Page xix
... circle . The Meridian circle . Fixation of polar and horizontal points . The level , plumb- line , artificial horizon . Principle of collimation . Collimators of Rittenhouse , Kater , and Bohnenberger . Of compound instruments with co ...
... circle . The Meridian circle . Fixation of polar and horizontal points . The level , plumb- line , artificial horizon . Principle of collimation . Collimators of Rittenhouse , Kater , and Bohnenberger . Of compound instruments with co ...
Page 17
... circle , having our station for its centre . That this line is really a circle , we conclude , first , from the perfect apparent similarity of all its parts ; and , secondly , from the fact of all its parts appearing at the same ...
... circle , having our station for its centre . That this line is really a circle , we conclude , first , from the perfect apparent similarity of all its parts ; and , secondly , from the fact of all its parts appearing at the same ...
Page 18
... circle NOPQ . The area of the spherical surface compre- Z B EA K G hended within this circle is the portion of the earth's surface visible to a spectator at M , and the angle N M Q included between the two extreme visual rays is the ...
... circle NOPQ . The area of the spherical surface compre- Z B EA K G hended within this circle is the portion of the earth's surface visible to a spectator at M , and the angle N M Q included between the two extreme visual rays is the ...
Page 42
... circle in the sky ; that the circles so described are not of the same magnitude for all the stars ; and that those described by different stars differ greatly in respect of the parts of them which lie above the horizon . Some , which ...
... circle in the sky ; that the circles so described are not of the same magnitude for all the stars ; and that those described by different stars differ greatly in respect of the parts of them which lie above the horizon . Some , which ...
Page 43
... circle ; others , which rise between the south and east , describe larger segments of their circles above the horizon , remain proportionally longer in sight , and set precisely as far to the westward of south as they rose to the ...
... circle ; others , which rise between the south and east , describe larger segments of their circles above the horizon , remain proportionally longer in sight , and set precisely as far to the westward of south as they rose to the ...
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 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