Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 pages |
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Page xiv
... AXES , PERIHELIA , AND EXCENTRICITIES . Variation of elements in general . Distinction between periodic and secular variations . Geometrical expression of tangential and normal forces . Variation of the Major Axis produced only by the ...
... AXES , PERIHELIA , AND EXCENTRICITIES . Variation of elements in general . Distinction between periodic and secular variations . Geometrical expression of tangential and normal forces . Variation of the Major Axis produced only by the ...
Page 39
... axis , till it has completed an entire revolution , and come back to the position from which it set out when the spectator began his observations , —it is manifest that every thing will then be in precisely the same relative position as ...
... axis , till it has completed an entire revolution , and come back to the position from which it set out when the spectator began his observations , —it is manifest that every thing will then be in precisely the same relative position as ...
Page 40
... axis about which it is at any moment revolving shall hold no fixed places on the surface , but shift upon it every moment . moment . Such changes , however , are inconsistent with the idea of a rotation . of a body of regular figure ...
... axis about which it is at any moment revolving shall hold no fixed places on the surface , but shift upon it every moment . moment . Such changes , however , are inconsistent with the idea of a rotation . of a body of regular figure ...
Page 46
... axis , every star describing half its diurnal circle above and half beneath his horizon , re- maining alternately visible for twelve hours , and concealed during the same interval . In this situation , no part of the heavens is ...
... axis , every star describing half its diurnal circle above and half beneath his horizon , re- maining alternately visible for twelve hours , and concealed during the same interval . In this situation , no part of the heavens is ...
Page 47
... axis . In order to show this , however , it will be necessary to premise a few ob- servations on parallactic motion in general , and on the appear- ances presented by an assemblage of remote objects , when viewed from different parts of ...
... axis . In order to show this , however , it will be necessary to premise a few ob- servations on parallactic motion in general , and on the appear- ances presented by an assemblage of remote objects , when viewed from different parts of ...
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Common terms and phrases
angle angular appear apsides ascertained astronomical 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 Edition effect elements ellipse epoch equal equator equinoctial equinox error exact excentricity fixed globe heavens heliocentric horizon inclination 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 planet planetary pole portion position Post 8vo precession proper motions proportion recede recess reckoned refraction respect result revolution right ascension rotation round satellites Saturn seen sidereal sidereal day sidereal period situation solar sphere spherical stars station sun's suppose surface syzygies tangential force telescope tion Uranus variation velocity visible vols whole Woodcuts zenith
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Page 674 - A Dictionary of Science, Literature, and Art : Comprising the History, Description, and Scientific Principles of every Branch of Human Knowledge ; with the Derivation and Definition of all the Terms in General Use. Edited by WT BRANDE, FRSL and E.