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St Williams Bay Wi - Yerkes Observatory - diretto a casa
St Williams Bay Wi - Osservatorio di Yerkes - Papà Maxwell per colazione
St Williams Bay Wi - Yerkes Observatory - Admin Brittnay Struble
St Williams Bay Wi - Yerkes Observatory - Greg, Scott e Dan danno un'occhiata all'interno del rifrattore da 40 "
St Williams Bay Wi - Yerkes Observatory - Oyepieces Galore
St Williams Bay Wi - Yerkes Observatory - La nostra prima vista
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