We think it's saltwater, and that would mean that there's more water on that moon of Jupiter than there is in all the oceans of the Earth combined.
Mēs domājam, ka tas ir sālsūdens,  un tas varētu nozīmēt, ka uz šī Jupitera pavadoņa ir vairāk ūdens nekā visos Zemes okeānos kopā ņemot.