Outlines of AstronomyLongman, Brown, Green, Longmans, 1851 - 661 стор. |
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Сторінка 6
... continually recurring to the sources from which the axioms themselves have been drawn ; viz . examples ; that is to say , by bringing forward and dwelling on simple and familiar instances in which the same principles and the same or ...
... continually recurring to the sources from which the axioms themselves have been drawn ; viz . examples ; that is to say , by bringing forward and dwelling on simple and familiar instances in which the same principles and the same or ...
Сторінка 11
... continual change of place , as we view them at dif- ferent hours of the day or night , or at different seasons of the year . The ancients , accordingly , one or two of the more en- lightened of them only excepted , admitted no such ...
... continual change of place , as we view them at dif- ferent hours of the day or night , or at different seasons of the year . The ancients , accordingly , one or two of the more en- lightened of them only excepted , admitted no such ...
Сторінка 24
... continually get above more and more of the air , and so relieve ourselves more and more from the pressure with which it weighs upon us , yet the amount of this additional relief , or the ponderable quantity of air surmounted , would be ...
... continually get above more and more of the air , and so relieve ourselves more and more from the pressure with which it weighs upon us , yet the amount of this additional relief , or the ponderable quantity of air surmounted , would be ...
Сторінка 27
... continually increasing in density , it will continually undergo greater and greater refraction in the same direction ; and thus , instead of pur- suing the straight line S d A , it will describe a curve Sdcba , continually more and more ...
... continually increasing in density , it will continually undergo greater and greater refraction in the same direction ; and thus , instead of pur- suing the straight line S d A , it will describe a curve Sdcba , continually more and more ...
Сторінка 30
... continually increases . Objects near the horizon appear more elevated by it above their true directions than those at a high altitude . 3dly . The rate of its increase is nearly in proportion to the tangent of the apparent angular ...
... continually increases . Objects near the horizon appear more elevated by it above their true directions than those at a high altitude . 3dly . The rate of its increase is nearly in proportion to the tangent of the apparent angular ...
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Outlines of Astronomy John Frederick William Herschel,Sir John Frederick William Herschel Повний перегляд - 1851 |
Загальні терміни та фрази
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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Сторінка 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.