Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 183
y look into this vast abyss ofspace and see the laws of gravitation holding good there,and calculate the orbit of one star about another. Whether the telescope be of the first or last order ofexcellence, its light-grasping powers will be practicallythe same ; there is therefore a great distinction… … F;g. 83. —Saturn and his moons (j^eneral view with a S^-inch object-glass.) If the defining power be not good, even if the air beperfect, each increase of the magnifying power so bringsout the defects of the image, that at last no details atall are visible, all outlines are blurred, or stellar…
Astronomy · Telescopes
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