Outlines of Astronomy |
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Page xiii
... compared . Density of the Sun. Force of gravity at its surface . Disturbing effect of the Sun on the Moon's motion ....... 233 ............................ .............. CHAPTER IX . OF THE SOLAR SYSTEM . Apparent motions of the ...
... compared . Density of the Sun. Force of gravity at its surface . Disturbing effect of the Sun on the Moon's motion ....... 233 ............................ .............. CHAPTER IX . OF THE SOLAR SYSTEM . Apparent motions of the ...
Page 29
... compared to what nature itself affords ; Etna , Tene- riffe , 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 , Tene- riffe , 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 33
... from mountains , valleys , buildings , & c . to the roughnesses on the rind of an orange , compared with its general mass . The compari- son is quite free from exaggeration . The highest mountain 3 SIZE OF THE EARTH . 33.
... from mountains , valleys , buildings , & c . to the roughnesses on the rind of an orange , compared with its general mass . The compari- son is quite free from exaggeration . The highest mountain 3 SIZE OF THE EARTH . 33.
Page 43
... in the former situation as compared with the latter , as will be explained farther on . ( 48. ) After what has been said of the small extent of the atmosphere in comparison with the mass of the earth , we TWILIGHT . 43.
... in the former situation as compared with the latter , as will be explained farther on . ( 48. ) After what has been said of the small extent of the atmosphere in comparison with the mass of the earth , we TWILIGHT . 43.
Page 45
... 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 Fig . 6 . * B occupies as an object ; but by walking round ...
... 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 Fig . 6 . * B occupies as an object ; but by walking round ...
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Common terms and phrases
altitude amount angle angular appear apsides ascertained astronomers axis bright calculation celestial centre circle 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 greater heavens heliocentric horizon inclination increase inequality instance instrument interval 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 perpendicular perturbations planet planetary pole portion position precession proper motions proportion recede recess reckoned refraction remarkable respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose syzygies tangential force telescope tion Uranus variation velocity visible whole zenith