A High-School Ascronomy: in Which the Descriptive, Physical, And Practical Are Combined
The book A High-School Ascronomy: in Which the Descriptive, Physical, And Practical Are Combined was written by author Mattison, Hiram, 1811-1868 Here you can read free online of A High-School Ascronomy: in Which the Descriptive, Physical, And Practical Are Combined book, rate and share your impressions in comments. If you don't know what to write, just answer the question: Why is A High-School Ascronomy: in Which the Descriptive, Physical, And Practical Are Combined a good or bad book?
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THE suit's motion IN SPACE. 327. Although, in general terms, we speak of the sun as the fixed center of the system, it must not be under- stood that the sun is absolutely without motion. On the contrary, he has a periodical motion, in nearly a circular direction, around the common center of all the planetary bodies ; never deviating from his position by more than twice his diameter. From the known laws of gravita- tion, it is certain that the sun is affected in some measure by the attraction of... the planets, especially when many of them are found on the same side of the ecliptic at the same time ; but this would by no means account for so great a periodical motion. 328. In addition to the motion above described, the sun is found to be moving, with all his retinue of planets and comets, in a vast orhit, around some distant and hitherto unknown center. This opinion was first ad- vanced, we think, by Sir William Herschel ; but the honor of actually determining this interesting fact be- longs to Struve, who ascertained not only the direction of the sun and solar system, but also their velocity.
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