Outlines of Astronomy |
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Page xxiv
... angular velocity . Equable description of areas . Parallax of the sun . Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in ...
... angular velocity . Equable description of areas . Parallax of the sun . Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in ...
Page xxiii
... angular intervals . Methods of increasing the accuracy of reading . The vernier . The microscope . Of the mural circle . The Meridian circle . Fixation of polar and horizontal points . The level , plumb- line , artificial horizon ...
... angular intervals . Methods of increasing the accuracy of reading . The vernier . The microscope . Of the mural circle . The Meridian circle . Fixation of polar and horizontal points . The level , plumb- line , artificial horizon ...
Page xxiv
... angular velocity . Equable description of areas . Parallax of the sun . Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in ...
... angular velocity . Equable description of areas . Parallax of the sun . Its distance and magnitude . Copernican explanation of the Sun's apparent motion . Parallelism of the Earth's axis . The seasons . Heat received from the Sun in ...
Page 17
... angular diameter of the visible area , as measured by the dip sector , is materially less than at a lower level ; or , in other words , that the apparent size of the earth has sensibly diminished as we have receded from its surface ...
... angular diameter of the visible area , as measured by the dip sector , is materially less than at a lower level ; or , in other words , that the apparent size of the earth has sensibly diminished as we have receded from its surface ...
Page 18
... angular diameter . Leaving , at present , out of con- sideration the effect of refraction in the air below M , of which more hereafter , and which always tends , in some degree , to increase that angle , or render it more obtuse , this ...
... angular diameter . Leaving , at present , out of con- sideration the effect of refraction in the air below M , of which more hereafter , and which always tends , in some degree , to increase that angle , or render it more obtuse , this ...
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Common terms and phrases
amount angle angular appear apsides ascertained astronomical atmosphere attraction axis bright calculation celestial circle coincidence comet curve described diameter difference direction disc distance disturbed body disturbing force diurnal diurnal motion double stars earth ecliptic effect ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere horizon inclination inequality instance instrument interval Jupiter latitude latter less light longitude lunar magnitude mass mean measure meridian micrometrical moon moon's nearly nebula node normal force nutation object observed orbit parallax parallel perigee perihelion period perturbations phænomena phænomenon planet planetary pole portion position precession precisely proper motion proportion recede recess 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 whole zenith