Keywords: Meridiaanisali 3.JPG en Meridian hall in Helsinki observatory designed for meridian and transit observations on positions of stars moving past the north-south meridian Window with shutters and openable observation shutters fi Helsingin observatorion Meridiaanisali pohjois-eteläsuuntaisen meridiaanin ohittavien tähtien paikkahavaintoja varten Luukuilla varustettu ikkuna ja avattavat havaintoaukot own MKFI 2012-12-01 Interior of the Helsinki Observatory 2012 in Helsinki December 2012 in Finland Taken with Canon EOS 60D Taken with Canon EF-S 15-85mm F3 5-5 6 IS USM Files by User MKFI |