Eisinga built the planetarium in his own home. So that it would fit into his living-room, he used a scale of 1:1,000,000,000,000 (1 millimetre: 1 million kilometres).
Eisinga built the planetarium to disprove a contemporary prophecy that certain planets were on a collision course and that the end of the world was therefore imminent. He hoped his model would demonstrate that the planets were actually in conjunction. He was not a scientist in the formal sense but a creative genius who built the planetarium entirely on his own initiative.
The planetarium has always been accessible to interested members of the public. It has also received scientific recognition. All Eisinga's books and writings have been preserved and are accessible to the public."
Source: UNESCO World Heritage Tentative List
Vintage postcard of Planetarium Eise Eisinga. Thanks to Peter of Netherlands.
Postcard 2Telescopic mechanism of Eise Esiginga Planetarium. Thanks to Ruyi of Netherlands for mailing using matching Eise Esiginga stamp set. Posted in November 11, 2019 and arrived in Penang island on November 23, 2019.