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Image from page 95 of "A high-school astronomy: in which the descriptive, physical, and practical are combined .." (1859) | by Internet Archive Book Images
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Image from page 95 of "A high-school astronomy: in which the descriptive, physical, and practical are combined .." (1859)

Identifier: highschoolastro00matt

Title: A high-school astronomy: in which the descriptive, physical, and practical are combined ..

Year: 1859 (1850s)

Authors: Mattison, Hiram, 1811-1868

Subjects: Astronomy

Publisher: New York, Mason brothers

Contributing Library: The Library of Congress

Digitizing Sponsor: The Library of Congress



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Text Appearing Before Image:

t, as thefixed stars in the distant heavens beyond have been seenthrough the opening in the rings, and between the planetand the first ring. The adjoining cut is an ex-cellent representation of Sa-turn as seen through a tele-scope. The oblateness of theplanet is easily perceptible,and his shadow can be seenupon the rings back of theplanet. The shadow of therings may also be seen run-ning across his disk. Thewriter has often seen theopening between the body ofthe planet and the interiorring as distinctly as it appearsto the student in the cut. Un-der very powerful telescopes, these rings are found to be again subdivided into an indefinite number of concentriccircles, one within the other, though this is considered doubtful by Sir John Herschel. 183. As our view of the rings of Saturn is generallyan oblique one, they usually appear elliptical, andnever circular. The ellipse seems to contract for about7\ years, till it almost entirely disappears, when it begins TELESCOPIC VIEW OP SATURN.


Text Appearing After Image:

181. Oblateness? Color? Eings—what like? How situated? Whatmotion ? Thickness ? 182. What said of substance of the rings ? What proof? What evidencethat they are detached ? (Eemark of author as to seeing satellites ? Ee-specting rings ? Opinion of Herschel ?) 183. What the general apparent figure of the rings? Why elliptical? SATURN. 91 to expand again, and continues to enlarge for 7-^ years,when it reaches its maximum of expansion, and againbegins to contract. For fifteen years, the part of therings toward us seems to be thrown up, while for thenext fifteen it appears to drop below the apparent centerof the planet; and while shifting from one extreme tothe other, the rings become almost invisible, appearingonly as a faint line of light running from the planet inopposite directions. The rings vary also in their inclina-tion, sometimes dipping to the right, and at others to theleft. TELESCOPIC PHASES OP THE KINGS OF SATURN.



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