Online Encyclopedia

GREAT CIRCLE

Online Encyclopedia
Originally appearing in Volume V12, Page 398 of the 1911 Encyclopedia Britannica.
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GREAT CIRCLE  . The circle in which a
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sphere is cut by a
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plane is called a "
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great circle," when the cutting plane passes through the centre of sphere . Treating the
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earth as a sphere,the meridians of
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longitude are all great circles . Of the
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parallels of
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latitude, the
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equator only is a great circle . The shortest
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line joining any two points is an arc of a great circle . For " great circle sailing " see
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NAVIGATION .

End of Article: GREAT CIRCLE
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