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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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O
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Orrery
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INFOTEXT
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1992-09-01
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208b
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A mechanical device for demonstrating the
motions of the heavenly bodies. Invented
about 1710 by George Graham, it was named
after his patron, the 4th Earl of Orrery. It
is the forerunner of the planetarium.