File:A high-school astronomy- in which the descriptive, physical, and practical are combined (1859) (14784047013).jpg

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Identifier: highschoolastro00matt (find matches)
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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rge;Venus, T9o ; Jupiter, 1,400 times as large; Saturn, 1,000times ; Uranus, 90 times; and Neptune, 60. 1. The magnitudes of spherical bodies are to each other as the cubes of their diam-eters. Thus, T912xT912x7912=495,289,174,428, the cube of the earths diameter; and2950x2950x2950=25,672,375,000, the cube of the diameter of Mercury. Divide theformer by the latter, and we have 19 and a fraction as the number of times the bulk ofMercury is contained in the earth. Astrsea . — Irene . . — Eunomia — Juno . , . 1,400 Ceres . . 163 Pallas . . 770 Hygeia. — Jupiter. 88,790 Saturn . . 79,300 Uranus. , 35,000 Neptune . 31,000 61. State the diameters of the several planets ? (Why blanks in thetable ? What diameters are given—polar, equatorial, or neither ?) 62. Give the magnitude of the principal planets, as compared with theearth. (How ascertain relative magnitudes ? How possible that a mere starcan be such an immense world ?) DENSITY. 41 COMPARATIVE MAGNITUDE OF THE SUN AND PLANETS.
Text Appearing After Image:
2. It may seem almost incredible that what appear only as small stars in the heavensshould be larger than the mighty globe upon which we dwell. But when we considertheir immense distance, and the effect this must have upon their apparent magnitude,as illustrated at 55, it is evident that the planets could not be seen at all were they notvery large bodies. The above cut will give some idea of the magnitude of the severalplanets, as compared with each other, and also with the sun. 63. The Sun is 1,400,000 times as large as our globe,and 500 times as large as all the other bodies of the solarsystem put together. It would take one hundred andtwelve such worlds as our earth, if laid side by side, toreach across his vast diameter. DENSITY. 64. The planets differ greatly in their density, or in thecompactness of the substances of which they are com-posed. Mercury is about three times as dense as ouiglobe, or equal to lead. Venus and Mars are about thesame as the earth ; while Jupiter and Ura

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  • bookid:highschoolastro00matt
  • bookyear:1859
  • bookdecade:1850
  • bookcentury:1800
  • bookauthor:Mattison__Hiram__1811_1868
  • booksubject:Astronomy
  • bookpublisher:New_York__Mason_brothers
  • bookcontributor:The_Library_of_Congress
  • booksponsor:The_Library_of_Congress
  • bookleafnumber:46
  • bookcollection:library_of_congress
  • bookcollection:americana
Flickr posted date
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28 July 2014



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