The Americana 1912: An Universal Reference Library Comprising the Arts and Sciences, Literature, History, Biography, Geography, Commerce, Etc. , of the World (Classic Reprint)

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Excerpt from The Americana, 1912: An Universal Reference Library Comprising the Arts and Sciences, Literature, History, Biography, Geography, Commerce, Etc., Of the World

When the observations of these transits were worked up, it was found that they would not give so certain a result as was anticipated. No two observers seemed to a cc as to the exact moment at which Venus ad entered wholly upon the disc of the sun. The entrance was not seen in the sharp and precise way it should be seen, but seemed to be uncertain, through a dark haze forming on the two limbs at the moment when Venus was entering. The out come of the affair was that it was more than 60 years after the last transit before a result had been worked up from it which was sup posed to be quite satisfactory. This was done by Encke in 1822. The distance of the sun which he derived was, in round numbers, 95, miles. This distance appeared in all astronomical textbooks and was almost uni formly accepted for 30 years.

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