Ganymede appears to possess various ocean levels, stacked up with layers of ice in between them. The best volume of ice will be the crust, which might be about 150 kilometers (about ninety miles) thick. The bottom ocean amount may be 800 kilometers (about 500 miles) under that, just above https://moons48270.blognody.com/36980737/the-greatest-guide-to-best-moons