Orrery, Planetenmaschine, no date. From the auction La Maison D’Alberto - Collection Italienne. An o
Orrery, Planetenmaschine, no date. From the auction La Maison D’Alberto - Collection Italienne. An orrery is a mechanical device that illustrates the relative positions and motions of the planets and moons in the Solar System in a heliocentric model. They are typically driven by a clockwork mechanism. Wikipedia. -- source link
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