We’re back in Saturn’s neighbourhood here, with one if its moons, Enceladus.
Those bright plumes pictured above are made up of tons and tons of material being fired from beneath the moon’s surface and off into space. Some of this falls back to the surface as snow, but a lot of it escapes and supplies much of the material that goes into making Saturn’s rings. It looks like Enceladus is creating a nice little ring all its own.
It’s not entirely certain what is causing Enceladus to expel its innards into space, but many scientists think that it could be evidence of an ocean of liquid water, locked beneath the icy surface.
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