Electro astronomical atlas ... with explanatory notes, questions and answers (1874)
Spoor, J. W. (Joseph W.) · Albany, N.Y., Weed, Parsons and Company · leaf 49
moving planetyet discovered. Q. Why does he move swifter than any otherplanet ? A. Because being nearer the Sun than anyother planet, the electrical power of the Sun, inattraction and repulsion, is far greater; therefore,he must of necessity move swifter, and the centralforce and circular motion… … Q. When and why is he said to be in his infe-rior conjunction? A. When he is between the Earth and Sun, andbecause he is then in range with them. Q. When and why is he in his superior con-junction ? A. When beyond the Sun, and in range with itand the Earth. Q. How far is Mercuryfrom the Earth ? A.…
Astronomy
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