File:The fireside university of modern invention, discovery, industry and art for home circle study and entertainment (1902) (14779606475).jpg

Identifier: firesideuniversi01mcgo (find matches)
Title: The fireside university of modern invention, discovery, industry and art for home circle study and entertainment
Year: 1902 (1900s)
Authors: McGovern, John. (from old catalog)
Subjects: Science
Publisher: Chicago, Union pub. house
Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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s 1,233 times as large as the Earth. Compare the Earth and Moon with the Sun. If the Earth were placed in the centre of the Sun, and theMoon were put at her proper distance, 238,000 miles outward,she (the Moon) would revolve within the crust of the Sun a dis-tance of over 167,000 miles, leaving by far the greater portion ofthe Suns mass outside of her orbit. In looking from the Earthto the Moon, this statement can be profitably borne in mind. 462 THE FIRESIDE UNIVERSITY. The Sun does not weigh proportionately to its bulk. Whileit is 1,273,000 times larger than the Earth, it is only 325,000times as heavy. The heat given out by the Sun is prodigiousbeyond all idea of combustion. The successful burning of tonsand tons of coal in every second on every square inch ofthe Earths surface would secure an insignificant comparisonwith the flames of the Sun, owing to the superiorityin size of the celestial colossus. His light is found, bymeasurement, after traveling 92,800,000 miles to the Earths
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Fig. 171. PARHELIA, OR MOCK SUNS. surface, to have the power of 5,550 fine candles placed a footaway from the point to be lighted. What is seen on the Suns surface? While the Sun presents a beautiful, glossy surface to thesuffering eye which presumptuously peers at his majestic glory,still a more critical observation through the telescope discovers ASTRONOMY. 463 a most seething inquietude. Vast gorges and holes into whichthis petty world and all its planetary fellows could be heaved,suddenly appear in the surface, and then as suddenly do thetormented billows of effulgence sweep together, leaving no traceof the event. At the distance of 92,000,000 miles these gapingholes for worlds become merely Sun-spots, and, when not sofleeting as to immediately disappear, or where they are perma-nent, serve to demonstrate clearly that the Sun turns aroundon its axis, thus showing himself at least to be amenable to oneof the laws governing less important voyagers in space. Thefact of his rotation o

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