Eise Eisinga Planetarium
Fryslân
The Royal Eise Eisinga Planetarium in Franeker, Friesland, Netherlands, is the world's oldest functioning orrery, constructed between 1774 and 1781 by Eise Eisinga, a wool carder and amateur astronomer. This unique mechanical planetarium is ingeniously integrated into the timber ceiling of Eisinga's historic canal house living room, displaying the real-time positions of the planets with remarkable precision. The orrery operates via a pendulum clock with nine weights, moving the planets automatically, and includes detailed astronomical features such as the zodiac and lunar phases. The museum houses not only the planetarium but also Eisinga's former wool combing workshop, a collection of historical astronomical instruments including Georgian telescopes and 18th-century octants, and modern astronomy exhibits. The site also features a café and brasserie in an Art Nouveau former coffee-roasting house, enhancing the visitor experience. Recognized as a Rijksmonument and recently designated a UNESCO World Heritage Site, the planetarium is a testament to scientific ingenuity and cultural heritage, attracting visitors fascinated by astronomy and history alike.
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Tip: Visitors should book tickets online in advance to guarantee entry. The museum is open year-round, with extended hours from April to October including Mondays. The best time to visit is during weekdays to avoid crowds. The museum offers discounts for children and is recognized as a Kidsproof museum, making it suitable for family visits. Don't miss the interactive exhibitions and documentary screenings for a comprehensive experience. The nearby Brasserie De Stadstuin provides a pleasant spot for refreshments.
Interesting facts
- •The planetarium is the oldest still working orrery in the world, constructed to a scale of 1:1,000,000,000,000 (1 millimetre equals 1 million kilometres).
- •It was built using 10,000 handmade nails to create the gears.
- •The orrery is driven by a pendulum clock with nine weights, and the planets move in real time, requiring a manual reset every four years to adjust for leap years.
- •The zodiac and phases of the moon are depicted on the ceiling, with detailed astronomical information such as sunrise and sunset times.
- •King William I was so impressed by the planetarium that he purchased Eisinga's house, turning it into a royal planetarium.
History
Eise Eisinga built the mechanical planetarium between 1774 and 1781 to demonstrate the real positions of the planets and dispel fears caused by a predicted planetary conjunction in 1774.
His passion for mathematics and astronomy inspired him to create this working model integrated into his home.
The planetarium gained royal recognition when King William I purchased the house, making it a royal planetarium.
Over the centuries, it has been preserved as a Rijksmonument and was recently inscribed as a UNESCO World Heritage Site in 2023, marking its global cultural significance.
Place Guide
Planetarium Room1774-1781
The central feature of the museum, this room houses the mechanical orrery built into the ceiling, displaying the solar system's planets moving in real time. The intricate clockwork mechanism is visible above the ceiling, powered by a pendulum clock with nine weights.
Former Wool Combing Workshop18th century
This part of the museum exhibits Eise Eisinga's original wool combing business, reflecting his professional background alongside his astronomical pursuits.
Astronomical Instruments Collection18th century
A collection of historical astronomical instruments including Georgian telescopes, 18th-century octants, and a tellurium, providing context to the scientific environment of Eisinga's time.
Interactive Exhibition ‘De Ruimte’Since 2016
A modern, interactive exhibition explaining concepts such as how telescopes work, the causes of solar and lunar eclipses, and gravity's effect on weight, enhancing visitor engagement with astronomy.
Brasserie De StadstuinEarly 20th century (building)
An Art Nouveau-style brasserie located in the former Van Balen coffee-roasting house, offering refreshments and a pleasant atmosphere for visitors.
Contact
Phone: 0517 393 070
