Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page 27
... poles , some slight deviation from the rigorous expression of this law takes place , and in peculiar localities there is reason to believe that even considerable permanent depressions of the contours of these strata , below their ...
... poles , some slight deviation from the rigorous expression of this law takes place , and in peculiar localities there is reason to believe that even considerable permanent depressions of the contours of these strata , below their ...
Page 40
... of the sphere , whose poles or extremities , where it meets the surface , correspond • ПepÃodos , a going round , a circulation or revolution . always to the same points on the sphere . Modes 40 OUTLINES OF ASTRONOMY .
... of the sphere , whose poles or extremities , where it meets the surface , correspond • ПepÃodos , a going round , a circulation or revolution . always to the same points on the sphere . Modes 40 OUTLINES OF ASTRONOMY .
Page 41
... poles of the imaginary line or axis about which it is at any moment revolving shall hold no fixed places on the surface , but shift upon it every moment . Such changes , however , are inconsistent with the idea of a rotation of a body ...
... poles of the imaginary line or axis about which it is at any moment revolving shall hold no fixed places on the surface , but shift upon it every moment . Such changes , however , are inconsistent with the idea of a rotation of a body ...
Page 43
... POLE , which appears to be the common centre of all their motions , and which alone , in the whole heavens , may be considered immoveable . Not that this point is marked by any star . It is a purely imagi- nary centre ; but there is ...
... POLE , which appears to be the common centre of all their motions , and which alone , in the whole heavens , may be considered immoveable . Not that this point is marked by any star . It is a purely imagi- nary centre ; but there is ...
Page 44
... pole . In short , he will perceive that the whole assemblage of stars visible at once , or in succession , in the heavens , may be regarded as one great constellation , which seems to revolve with a uniform motion , as if it formed one ...
... pole . In short , he will perceive that the whole assemblage of stars visible at once , or in succession , in the heavens , may be regarded as one great constellation , which seems to revolve with a uniform motion , as if it formed one ...
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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 effect epoch equal equator equinoctial equinox error exact excentricity fixed globe gravity heavens heliocentric hemisphere 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 perturbations phænomena planet planetary pole portion position precession precisely proper motions proportion recede recess reckoned refraction remarkable render respect result revolution revolving right ascension ring 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 whole zenith