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Saint-Williams Bay WI - Observatoire Yerkes - rentré chez lui
St Williams Bay WI - Observatoire Yerkes - Daddy Maxwell pour le petit déjeuner
St Williams Bay Wi - Yerkes Observatoire - Admin Brittnay Struble
St Williams Bay WI - Yerkes Observatoire - Greg, Scott et Dan jettent un coup d'œil à l'intérieur du réfracteur de 40 "
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St Williams Bay WI - Observatoire Yerkes - Notre premier point de vue
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