File:Meridiaanisali 1.JPG

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English: Meridian hall in Helsinki observatory, designed for meridian and transit observations on positions of stars moving past the north-south meridian. From front to back: grand transit instrument, vertical circle, heliometer and meridian circle.
Suomi: Helsingin observatorion Meridiaanisali pohjois-eteläsuuntaisen meridiaanin ohittavien tähtien paikkahavaintoja varten. Etualalta taakse: suuri ohikulkukone, vertikaaliympyrä, heliometri ja meridiaanikone.
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current15:49, 12 January 2013Thumbnail for version as of 15:49, 12 January 20135,184 × 3,456 (12.63 MB)MKFI (talk | contribs){{Information |Description ={{en|1=Meridian hall in Helsinki observatory, designed for meridian and transit observations on positions of stars moving past the north-south meridian. From front to back: grand transit instrument, vertical circle, helio...

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