The world's oldest working planetarium is located in the living room of a small, two-story house in the city of Franeker, here in the Netherlands. The house belonged to an 18th-century wool comber called Eise Eisinga, who built this remarkable mechanical model of the solar system to show to his townsfolk how the heavens actually worked.
The Eisinga Planetarium hangs from the ceiling - a golden orb represents the sun and descends from the middle of the ceiling, with a number of other smaller orbs, representing the planets, rest in concentric grooves around the sun.
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