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Message: <blockquote data-quote="Wolverine GTR" data-source="post: 19154388" data-attributes="member: 158020">පැරණිතම_ක්‍රියාකාරී_ග්‍රහලෝකාගාරය-The World’s Oldest Working Planetarium-Eisinga Planetarium- The world’s oldest working planetarium is located in the living room  of a small, two-story house in the city of Franeker, 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 (also  called an orrery) to show to his townsfolk how the heavens actually  worked.   Eisinga’s planetarium was built at a time when the nation  was gripped by panic and hysteria. It started with a small book  published in 1774 by a Dutch preacher named Eelco Alta, from the Frisian  village of Bozum, in which he made a clichéd yet terrifying prediction —  the end of earth. Earlier, astronomers had announced that an unusual  conjunction of the moon and the planets Mercury, Venus, Mars, and  Jupiter was to happen on 8 May, 1774. Alta argued that on this very day,  the planets and their moon would collide, with the result that the  earth would be propelled out of its orbit and burned by the sun. Eise Eisinga, who had mastered mathematics and astronomy in addition  to combing wool, wanted to show there was no reason for panic. To prove  Alta wrong and to reassure the Dutch people, Eisinga decided to build a  planetarium in his living room.   The Eisinga Planetarium “hangs”  from the ceiling — a golden orb, somewhat larger than a baseball,  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. A pendulum clock and a series of  intricate mechanical gears which he fashioned with his own hand, and  located in the attic above the ceiling hidden from view, drives the  planets at the precise rate they do in our solar system. This means that  the Earth takes exactly 365 days to make one complete rotation. Mercury  takes 88 days, Venus 224 days, Mars 687 days and Saturn over 29 years.   The  planetarium was built at a scale of 1 millimeter: 1 million kilometers,  so that it would fit on Eisinga’s living room ceiling. The planets,  however, are not to scale because this would make them too small to see.  In addition to the basic orrery, the model provides information such as  time of sunrise and sunset, the phase of the moon and other  astronomical phenomena. Aside from some minor adjustments that need to  be made every four years to account for the extra day in a leap year,  the model is still precise to this day.   Eisinga expected to  finish the planetarium within six months, but it took him seven long  years. He eventually finished it in 1781. The Eisinga Planetarium  received a lot of visitors since its opening. When King William I  visited the planetarium in 1818, he was so impressed that he  subsequently bought it for the Dutch state.   Eisinga died on in  1828, after which his son took over the running of the planetarium. The  Eisinga family continued to run the planetarium until 1922. Since then,  its run by curators appointed by the city of Franeker. <img src="http://lh3.googleusercontent.com/-FuiwiHITHAI/ViT4KOlLeKI/AAAAAAABH-w/DkV3jV4rlvk/eisinga-planetarium-3%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-eNGNsDyh04A/ViT4MYiVNMI/AAAAAAABH-4/GkWFxOTxBdA/eisinga-planetarium-2%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-VKu3yGgeEwo/ViT4NjVo4vI/AAAAAAABH_A/NMH9UTBpYMA/eisinga-planetarium-11%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-_b6TqpClnow/ViT4OzbChqI/AAAAAAABH_I/UHGuEBby4Qk/eisinga-planetarium-12%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-1l7MGZx4dBU/ViT4QGJsjKI/AAAAAAABH_Q/--Mta02r-c8/eisinga-planetarium-10%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-d0vP-l9k7lU/ViT4RmChSwI/AAAAAAABH_Y/zV456LyLc2w/eisinga-planetarium-9%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-eEuVwLmbayk/ViT4S7grZ6I/AAAAAAABH_g/b4U1kTQhEms/eisinga-planetarium-14%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-eEdXmckE3f8/ViT4UKCymwI/AAAAAAABH_o/eBQwQOl8zNU/eisinga-planetarium-1%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-lojNLH3fw00/ViT4VbcaW8I/AAAAAAABH_w/W7ujnsfXVGM/eisinga-planetarium-8%25255B6%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-BLLjUAnDsJ8/ViT4WY4eXcI/AAAAAAABH_4/kWRU2X-OtCc/eisinga-planetarium-6%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /> <img src="http://lh3.googleusercontent.com/-HDzn9b1qgWo/ViT4Xo_MQzI/AAAAAAABIAA/erhbLSI4dRU/eisinga-planetarium-7%25255B2%25255D.jpg?imgmax=800" alt="" class="fr-fic fr-dii fr-draggable " style="" /></blockquote>

Verification: Hathara warak wissa keeyada? (Hathara wadi karanna 20)

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