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Definition of planisphere
: a representation of the circles of the sphere on a plane; especially : a polar projection of the celestial sphere and the stars on a plane with adjustable circles or other appendages for showing celestial phenomena for any given time
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Origin and Etymology of planisphere
alteration of Middle English planisperie, from Medieval Latin planisphaerium, from Latin planum plane + sphaera sphere
Learn More about planisphere
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Britannica.com: Encyclopedia article about planisphere
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