ersatz_read (ersatz_read) wrote in 1word1day,
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orrery

orrery (ôr-r, r-), noun.  1. A mechanical model of the solar system in which the planets can be moved at the correct relative velocities around the sun.  2. a planetarium or similar device.

Etymology:  In the early 1700s, one of the first modern orreries was designed by George Graham and built by instrument maker John Rowley, who then presented it to his patron Charles Boyle, the 4th Earl of Orrery; the device was named in his honor.


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Tags: noun, o, wordsmith: ersatz_read
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