The picture I chose this week is of one of Jupiter's moons, Io. It is a picture of Io's "true colors," because this is what it would look like to the human eye if we could see it. (It looks like moldy cheese to me) But the reason for Io's unique color and composition is because Io is covered in active volcanos. And, because they are constantly erupting and lava is drying on the surface, the volcanos are essentially turning the whole moon inside out. But more specifically, Io is made of sulfur and molten silicate rock. Some of the volcanic lava on Io is even so hot it glows in the dark! So, while Io is always made of the same chemicals, its physical composition is in constant change due to all the volcanic activity.
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