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quSysOrt.svg Astronomisches Koordinatensystem des quators ortsfest own Dr Ing Wetzel alias Analemma at org de Analemma Original upload log page de quSysOrt svg Analemma bytes no Andere Versionen Analemma bytes no Andere Versionen Analemma bytes no Analemma Andere Versionen Lizenz Bildfrei Celestial coordinate