Outlines of astronomy |
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Page xxii
... nearly circular orbits . Application to the case of the Moon . Theory of the lunar apsides and excentricity . Ex- perimental illustration . Application of the foregoing principles to the Planetary theory . Compensation in orbits very nearly ...
... nearly circular orbits . Application to the case of the Moon . Theory of the lunar apsides and excentricity . Ex- perimental illustration . Application of the foregoing principles to the Planetary theory . Compensation in orbits very nearly ...
Page 19
... nearly straight , but will not attain perfect straightness till M is brought fairly up to contact with the surface at m , in which case its whole length will become a tangent to the sphere at m , as is the line xy . ( 23. ) This ...
... nearly straight , but will not attain perfect straightness till M is brought fairly up to contact with the surface at m , in which case its whole length will become a tangent to the sphere at m , as is the line xy . ( 23. ) This ...
Page 21
... nearly to the surface of the sea . By this time the sun was set , and the shades of evening began to close in . He threw out nearly all his ballast , and suddenly sprang upwards to a great height , and by so doing brought his horizon to ...
... nearly to the surface of the sea . By this time the sun was set , and the shades of evening began to close in . He threw out nearly all his ballast , and suddenly sprang upwards to a great height , and by so doing brought his horizon to ...
Page 25
... nearly that of Cotopaxi ) through one - half the material , or , at least , the ponderable body of air incumbent on the earth's surface . From the progression of these numbers , as well as , à priori , from the nature of the air itself ...
... nearly that of Cotopaxi ) through one - half the material , or , at least , the ponderable body of air incumbent on the earth's surface . From the progression of these numbers , as well as , à priori , from the nature of the air itself ...
Page 47
... nearly parallel to the horizon ; and , in short , every appearance leads to suppose that could he travel far enough to the north , he would at length attain a point vertically under the north- ern pole of the heavens , at which none of ...
... nearly parallel to the horizon ; and , in short , every appearance leads to suppose that could he travel far enough to the north , he would at length attain a point vertically under the north- ern pole of the heavens , at which none of ...
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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