Outlines of Astronomy |
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Page ix
... ellipse is brought distinctly under inspection ; and a clearness of conception introduced into the perturbations of the excentricities , perihelia , and epochs which the author does not think it presump- tion to believe can be obtained ...
... ellipse is brought distinctly under inspection ; and a clearness of conception introduced into the perturbations of the excentricities , perihelia , and epochs which the author does not think it presump- tion to believe can be obtained ...
Page xxiv
... ellipse about the focus . Law of the 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 ...
... ellipse about the focus . Law of the 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 ...
Page xxiv
... ellipse about the focus . Law of the 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 ...
... ellipse about the focus . Law of the 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 ...
Page 131
... ellipses ; so that , on such a shaped earth , the horizon of a spectator would nowhere ( except at the poles ) be exactly circular , but somewhat elliptical . It is easy to demonstrate , however , that its deviation from the circular ...
... ellipses ; so that , on such a shaped earth , the horizon of a spectator would nowhere ( except at the poles ) be exactly circular , but somewhat elliptical . It is easy to demonstrate , however , that its deviation from the circular ...
Page 138
... ellipse , or nearly so , having NS , the axis of the earth , for its shorter , and EF , the equatorial diameter , for its longer axis ; and that the form of the earth's surface is that which would arise from making such a curve revolve ...
... ellipse , or nearly so , having NS , the axis of the earth , for its shorter , and EF , the equatorial diameter , for its longer axis ; and that the form of the earth's surface is that which would arise from making such a curve revolve ...
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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