Outlines of astronomy |
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Page 7
... precisely in the mode of action . He has followed out a train of rea- soning by logical and technical rules , but the signs he has employed are not pictures of nature , or have lost their ori- ginal meaning as such to his mind : he has ...
... precisely in the mode of action . He has followed out a train of rea- soning by logical and technical rules , but the signs he has employed are not pictures of nature , or have lost their ori- ginal meaning as such to his mind : he has ...
Page 39
... 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 40
... precisely the same relative 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 ; and ...
... precisely the same relative 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 ; and ...
Page 43
... 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 45
... and show themselves for a few moments above it , precisely as those near the cir- cumference of the northern segment graze his northern horizon , and dip for a moment below it , APPEARANCES RESULTING FROM CHANGE OF STATION . 45.
... and show themselves for a few moments above it , precisely as those near the cir- cumference of the northern segment graze his northern horizon , and dip for a moment below it , APPEARANCES RESULTING FROM CHANGE OF STATION . 45.
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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