Newcomb, Simon, 1835-1909 · New York, H. Holt & company · leaf 154
ire hemi- sphere of the earth on which the moon is shining, and as it lasts several hours, observers who are not in this hemi- sphere at the beginning of the eclipse may, by the earth's rotation, be brought into it before it ends. Thus the eclipse will be seen over more than half the earth's… … Fig. 43.— Comparison op Shadow and Penumbra op Earth and Moon. A IS THE Position op the Moon during a Solar, B during a Lunar, Eclipse. It will be seen that, in order to have either a total or annular eclipse visible upon the earth, the line joining the centres of the sun and moon, being continued,…
Astronomy
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