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Ole Rømer, Planetarium


Ole Rømer (1644-1710)
Planetarium, 1680
Paris, Bibliothèque Nationale de France, inv. GA 280

This extremely beautiful planetarium, built for King Louis XIV of France, shows the orbits of the planets and the Moon, with the Sun in the centre. For the first time, a complex mechanism drives the planets at variable speeds. A calendar on the rear quadrant shows the months and days.