Outlines of AstronomyLongman, green and Roberts, 1859 - 714 pages |
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Page 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 ...
Page 10
... continual process of rectification and correction - of abandoning one point of view for another higher and better - of temporary and occa- sional reception of even positive and admitted errors for the convenience they afford towards ...
... continual process of rectification and correction - of abandoning one point of view for another higher and better - of temporary and occa- sional reception of even positive and admitted errors for the convenience they afford towards ...
Page 12
... 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 ...
Page 25
... 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 ...
Page 28
... 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 Sde ba , continually more and ...
... 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 Sde ba , continually more and ...
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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