The book Astronomy for Students And General Readers was written by author Newcomb Simon Here you can read free online of Astronomy for Students And General Readers book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is Astronomy for Students And General Readers a good or bad book?
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As the case now stands, the repulsion of the sun upon the comet's tail is to be regarded as a well-ascertained and entirely isolated fact which has no known counterpart in any other observed fact of nature. In view of the difficulties we find in explaining the phenomena of comets by principles based upon our terrestrial chemistry and physics, the question will arise whether the matter which composi s these bodies may not be of a constitution entirely different from that of any matter we are acq...uainted with at the earth's surface. If this were so, it would be impossible to give a complete explanation of comets until we know what forms matter might possibly assume different from those we find it to have assumed in our labora- tories. This is a question which we merely suggest without attempting to speculate upon it. It can be answered only by ex- perimental researches in chemistry and physics. § 4. MOTIONS OP COMETS. Previous to the time of Newton, no certain knowledge respecting the actual motions of comets in the heavens had been acquired, except that they did not move around 396 ASTBONOMr.
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