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- It was at the northeast region of the Beijing Ancient Observatory.
- It is the fourth most ancient observatory in the world that is still functioning.
- The National Planetarium extends to a space theme park where replicas of ancient observatories are sited.
- A sort of an ancient observatory the oldest in East Asia was found at Taosi that seems to coincide with the ancient records.
- It is named after Friedrich Wilhelm Argelander ( 1799 1875 ), author of the famous " Bonner Durchmusterung " and 19th-century head of the ancient observatory at Turku.