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Moving models of the sun and planets
Answer for the clue "Moving models of the sun and planets ", 8 letters:
orreries
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Wiktionary
Word definitions in Wiktionary
n. (plural of orrery English)
The Collaborative International Dictionary
Word definitions in The Collaborative International Dictionary
Orrery \Or"re*ry\, n.; pl. Orreries . [So named in honor of the Earl of Orrery.] An apparatus which illustrates, by the revolution of balls moved by wheelwork, the relative size, periodic motions, positions, orbits, etc., of bodies in the solar system.