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The Epic Interactive Encyclopedia 1998
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Epic Interactive Encyclopedia, The - 1998 Edition (1998)(Epic Marketing).iso
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Equator
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INFOTEXT
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1992-09-02
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310b
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The terrestrial equator is the great circle
whose plane is perpendicular to the Earth's
axis (the line joining the poles). Its length
is 40,092 km/24,901.8 mi, divided into 360
degrees of longitude. The celestial equator
is the circle in which the plane of the
Earth's equator intersects the celestial
sphere.