Outlines of astronomy |
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Page 13
... earth , unperceived by its in- habitants : we must remember that it is of the earth as a whole , with all that it holds within its substance , or sustains on its surface , that we are speaking ; of APPARENT AND REAL MOTIONS . 13.
... earth , unperceived by its in- habitants : we must remember that it is of the earth as a whole , with all that it holds within its substance , or sustains on its surface , that we are speaking ; of APPARENT AND REAL MOTIONS . 13.
Page 14
... whole mass , that we feel most satisfactorily the identity of sensation between a state of motion and one of rest . In the cabin of a large and heavy vessel , going smoothly before the wind in still water , or drawn along a canal , not ...
... whole mass , that we feel most satisfactorily the identity of sensation between a state of motion and one of rest . In the cabin of a large and heavy vessel , going smoothly before the wind in still water , or drawn along a canal , not ...
Page 16
... whole year , we shall find them constantly shifting , round a very large extent of the horizon ; and , besides , the ... whole earth , are yet too considerable with respect to ourselves and to that small portion of it which we can see at ...
... whole year , we shall find them constantly shifting , round a very large extent of the horizon ; and , besides , the ... whole earth , are yet too considerable with respect to ourselves and to that small portion of it which we can see at ...
Page 20
... whole . - ( 25. ) In the first place , then , every one who has passed a little while at the sea side is aware that objects may be seen perfectly well beyond the offing or visible horizon — but not the whole of them . We only see their ...
... whole . - ( 25. ) In the first place , then , every one who has passed a little while at the sea side is aware that objects may be seen perfectly well beyond the offing or visible horizon — but not the whole of them . We only see their ...
Page 21
... whole disappears : while yet the distinctness with which the last portion of the sail d is seen is such as to satisfy us that were it not for the interposed segment of the sea , ABCDE , the distance TE is not so great as to have ...
... whole disappears : while yet the distinctness with which the last portion of the sail d is seen is such as to satisfy us that were it not for the interposed segment of the sea , ABCDE , the distance TE is not so great as to have ...
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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