Outlines of Astronomy |
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Page xxv
... compared . Density of the Sun. Force of gravity at its surface . Disturbing effect of the Sun on the Moon's motion CHAPTER IX . OF THE SOLAR SYSTEM . · 290 Apparent motions of the planets . The stations and retrogradations . The Sun ...
... compared . Density of the Sun. Force of gravity at its surface . Disturbing effect of the Sun on the Moon's motion CHAPTER IX . OF THE SOLAR SYSTEM . · 290 Apparent motions of the planets . The stations and retrogradations . The Sun ...
Page 17
... compared to what nature itself affords ; Etna , Teneriffe , Mowna Roa , are eminences from which no contemptible aliquot part of the whole earth's surface can be seen ; but from these again — in those few and rare occasions when the ...
... compared to what nature itself affords ; Etna , Teneriffe , Mowna Roa , are eminences from which no contemptible aliquot part of the whole earth's surface can be seen ; but from these again — in those few and rare occasions when the ...
Page 23
... compared with its general mass . The comparison is quite free from exag- geration . The highest mountain known hardly exceeds five miles in perpendicular elevation : this is only one 1600th part of the earth's diameter ; consequently ...
... compared with its general mass . The comparison is quite free from exag- geration . The highest mountain known hardly exceeds five miles in perpendicular elevation : this is only one 1600th part of the earth's diameter ; consequently ...
Page 36
... compared with the latter , as will be ex- plained farther on . ( 48. ) After what has been said of the small extent of the atmosphere in comparison with the mass of the earth , we shall have little hesitation in admitting those ...
... compared with the latter , as will be ex- plained farther on . ( 48. ) After what has been said of the small extent of the atmosphere in comparison with the mass of the earth , we shall have little hesitation in admitting those ...
Page 37
... comparing him to a person standing in a park close to a large tree . The massive obstacle presented by its trunk cuts off his view of all those parts of the landscape which it occupies as an object ; but by walking round it a complete ...
... comparing him to a person standing in a park close to a large tree . The massive obstacle presented by its trunk cuts off his view of all those parts of the landscape which it occupies as an object ; but by walking round it a complete ...
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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