Outlines of Astronomy |
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Page 21
... body of science to meet its exigencies . The difference is that of pioneering a road through an un- traversed country and advancing at ease along a broad and beaten high- way ; that is to say , if we are determined to make ourselves ...
... body of science to meet its exigencies . The difference is that of pioneering a road through an un- traversed country and advancing at ease along a broad and beaten high- way ; that is to say , if we are determined to make ourselves ...
Page 24
... bodies , the earth itself , regarded as an individual body , is one principal object of the astronomer's consideration , and indeed , the chief of all . It derives its importance , in 86 1 · Aorno , a slar ; voμos , a law ; or vεμɛv ...
... bodies , the earth itself , regarded as an individual body , is one principal object of the astronomer's consideration , and indeed , the chief of all . It derives its importance , in 86 1 · Aorno , a slar ; voμos , a law ; or vεμɛv ...
Page 25
... bodies , and to assume any community of nature among things apparently so different . For what , in fact , can be more apparently differ- ent than the vast and seemingly immeasurable extent of the earth , and the stars ? The earth is a ...
... bodies , and to assume any community of nature among things apparently so different . For what , in fact , can be more apparently differ- ent than the vast and seemingly immeasurable extent of the earth , and the stars ? The earth is a ...
Page 38
... bodies higher above the horizon in appearance than they are in reality . Any such body , situated actually in the true horizon , will appear above it , or will have some certain apparent altitude ( as it is called ) . Nay , even some of ...
... bodies higher above the horizon in appearance than they are in reality . Any such body , situated actually in the true horizon , will appear above it , or will have some certain apparent altitude ( as it is called ) . Nay , even some of ...
Page 47
... bodies will appear to occupy the same places in the concave of the sky which they did at that instant , except such as ... body under the influence of external agency are con- ceivable , in which the poles of the imaginary line or axis ...
... bodies will appear to occupy the same places in the concave of the sky which they did at that instant , except such as ... body under the influence of external agency are con- ceivable , in which the poles of the imaginary line or axis ...
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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