Ganymede, eyi totobijulo ninu awon osupa yi ni diamita totobiju planet Mercury lo.Jupiteri ti je wiwakiri ninu lopolopo igba pelu oko-ofurufu roboti, agaga nigba awon iranlose ifokoja Pioneer ati Voyager ati leyin won pelu Galileo orbiter.. 
Ni January 5, 2007, ó jẹ́ sídi igbákejì akọ̀wé àgbà Cox àwọn orílẹ̀-èdè 