One of Jupiter's Moons is Melted! - Universe Today
[/caption] Jupiter’s two moons Ganymede and Callisto could be considered fraternal twins. They have a similar composition and size, but visually, they are different. Also, data from the Galileo and Voyager spacecraft reveal the two moons’ interiors are very dissimilar, as well. The reasons for the differences have eluded scientists for 30 years, but a … Continue reading "One of Jupiter’s Moons is Melted!"