Outlines of Astronomy |
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Page 46
... precisely as in the case of our traveller in the foregoing article . Recurring to the figure of that article , it is evidently the same thing , so far as their visibility is concerned , whether he has been carried by the earth's ...
... precisely as in the case of our traveller in the foregoing article . Recurring to the figure of that article , it is evidently the same thing , so far as their visibility is concerned , whether he has been carried by the earth's ...
Page 47
... precisely the same rela- tive position as at the outset : all the heavenly bodies will appear to occupy the same places in the concave of the sky which they did at that instant , except such as may have actually moved in the interim ...
... precisely the same rela- tive position as at the outset : all the heavenly bodies will appear to occupy the same places in the concave of the sky which they did at that instant , except such as may have actually moved in the interim ...
Page 49
... precisely as far to the westward of south as they rose to the eastward ; while such as rise exactly in the east remain just twelve hours visible , describe a semicircle , and set exactly in the west . With those , again , which rise ...
... precisely as far to the westward of south as they rose to the eastward ; while such as rise exactly in the east remain just twelve hours visible , describe a semicircle , and set exactly in the west . With those , again , which rise ...
Page 51
... precisely as those near the circumference of the northern segment graze his northern hori- zon , and dip for a moment below it , to re - appear immediately . Every point in a spherical surface has , of course , another diametrically ...
... precisely as those near the circumference of the northern segment graze his northern hori- zon , and dip for a moment below it , to re - appear immediately . Every point in a spherical surface has , of course , another diametrically ...
Page 53
... precisely such as we have described as what must subsist at the pole itself , have proved to be in exact correspon- dence with its near proximity . A similar remark applies to the south pole of the earth , which , however , is more ...
... precisely such as we have described as what must subsist at the pole itself , have proved to be in exact correspon- dence with its near proximity . A similar remark applies to the south pole of the earth , which , however , is more ...
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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