Lockyer, Norman, Sir, 1836-1920, Seabroke, G. M. (George Mitchell), 1848-1918 · London, Macmillan and co. · leaf 179
fwe neglect rays and diffraction rings, being really much 150 STARGAZING : PAST AND PRESENT. [book ir. smaller than the apparent size due to physiologicaleffects, and of this latter size every star must appear. The accompanying woodcuts of a region in the con-stellation of Gemini as seen with the… … Fig. 81.—Orion and the neighbouring constellations. even with small telescopes and low powers, often occupyan appreciable space on the retina. On increasing theaperture we must also increase the power of the eyepiece,in order that the more divergent cones of light from eachpoint of the image shall…
Astronomy · Telescopes
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