Ganymede appears to get various ocean levels, stacked up with levels of ice in between them. The highest degree of ice is definitely the crust, which could be about a hundred and fifty kilometers (about ninety miles) thick. The lowest ocean level might be 800 kilometers (about 500 miles) beneath https://bestmoons15930.digiblogbox.com/59350261/the-smart-trick-of-moons-that-nobody-is-discussing