Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 pages |
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Page xi
... increase the accuracy of pointing . Simplest application of this principle . The transit instrument . Of the measurement of angular intervals . Methods of increasing the accuracy of reading . The vernier . The microscope . Of the mural ...
... increase the accuracy of pointing . Simplest application of this principle . The transit instrument . Of the measurement of angular intervals . Methods of increasing the accuracy of reading . The vernier . The microscope . Of the mural ...
Page xiv
... increase and diminu- tion . Average effect in a whole revolution . Compensation in a com- plete revolution of the nodes . Lagrange's theorem of the stability of the inclinations of the planetary orbits . Change of obliquity of the ...
... increase and diminu- tion . Average effect in a whole revolution . Compensation in a com- plete revolution of the nodes . Lagrange's theorem of the stability of the inclinations of the planetary orbits . Change of obliquity of the ...
Page 17
... increase that angle , or render it more obtuse , this is the angle measured by the dip sector . Now , it is evident ... increases ; 2dly , that the distance of the visible horizon or boundary of our view from the eye , Opigw , to ...
... increase that angle , or render it more obtuse , this is the angle measured by the dip sector . Now , it is evident ... increases ; 2dly , that the distance of the visible horizon or boundary of our view from the eye , Opigw , to ...
Page 18
John Frederick William Herschel. viz . the line MN , increases ; and , 3dly , that the angle N becomes less obtuse , or , in other words , the apparent an diameter of the earth diminishes ... increases ; and , 18 OUTLINES OF ASTRONOMY .
John Frederick William Herschel. viz . the line MN , increases ; and , 3dly , that the angle N becomes less obtuse , or , in other words , the apparent an diameter of the earth diminishes ... increases ; and , 18 OUTLINES OF ASTRONOMY .
Page 17
... increase that angle , or render it more obtuse , this is the angle measured by the dip sector . Now , it is evident ... increases ; 2dly , that the distance of the visible horizon or boundary of our view from the eye , viz . the line MN ...
... increase that angle , or render it more obtuse , this is the angle measured by the dip sector . Now , it is evident ... increases ; 2dly , that the distance of the visible horizon or boundary of our view from the eye , viz . the line MN ...
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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.