which of jupiter’s moons is believed to be covered with water ice
Galilean moons Some models predict that there may have been several generations of Galilean satellites in Jupiter's early history. Each generation of moons to have formed would have spiraled into Jupiter and been destroyed, due to tidal interactions with Jupiter's proto-satellite disk, with new moons forming from the remaining debris. By the time the present generation formed, the gas in the proto-satellite disk had thinned out to the point that it no longer greatly interfered with the moons' orbits.[14][15] Other models suggest that Galilean satellites formed in a proto-satellite disk, in which formation timescales were comparable to or shorter than orbital migration timescales.[16] Io is anhydrous and likely has an interior of rock and metal.[14] Europa is thought to contain 8% ice and water by mass with the remainder rock.[14] These moons are, in increasing order of distance from Jupiter:
List of lunar features This is a list of maria (singular mare) on the Moon. Lunar Maria are the large, dark, regions of the moon. They do not actually contain any water, however they are believed to have been formed from molten rock from the moon's mantle coming out onto the surface of the moon. It also includes the one oceanus and the features known by the names lacus, palus and sinus. The modern system of lunar nomenclature was introduced in 1651 by Riccioli.[1] Riccioli's map of the moon was drawn by Francesco Maria Grimaldi, who has a crater named after him.[2]