Electro astronomical atlas ... with explanatory notes, questions and answers (1874)
Spoor, J. W. (Joseph W.) · Albany, N.Y., Weed, Parsons and Company · leaf 83
e pos-sibility of a totaleclipse of the Sunare the following : The Moon must be in conjunction, that is, she must be new; She must at the same time be near a node ; Lastly, her distance from the Earth must be less than the length of the cone of shadow projected by her into space. The same… … A. Two.Q. What is the greatestnumber possible ?A. It is seven. Fig. 33.PROGRESS of a central eclipse. 50 ELECTRO-ASTRONOMICAL ATLAS.
Astronomy
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