an imaginary line drawn around the earth equally distant from both poles, dividing the earth into northern and southern hemispheres and constituting the parallel of latitude 0°.
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tropic of Capricorn
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23 1/2 Degrees South of the Equator
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oceans
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prime meridian
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The meridian, designated at 0° longitude, which passes through the Royal Observatory at Greenwich, England.
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tropic of cancer
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a line of latitude about 23 degrees North of the equator