Proctor, Richard A. (Richard Anthony), 1837-1888 · New York, A.C. Armstrong and son · leaf 219
fig. 25, represent the great dark space seenby South, just below the principal belt, and let us supposethe planet turned round until this dark space, or ratherthis opening in the planets outer cloud-envelope, isII brought to the edge as at a r d^ fig. 26. Then this THE PLANET yUPiTER. ^oj opening… … Fig. 25. Fig. 26. the belt are generally lost, and the outline is at all timessmoothed in appearance by that peculiarity of visionwhich makes all bright objects seen on a dark back-ground appear somewhat larger than they actually are.(This is really due to a fringing, as it were, of the imageon the…
Astronomy
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