bild

Jupiter from Europa. Computer illustration of a view across the surface of Jupiter's moon Europa, towards Jupiter (upper centre) and another of its moons Io (small, upper centre) on the horizon. Europa is the sixth-closest moon of the planet Jupiter, and the smallest of its four Galilean moons. Io is the innermost of the four Galilean moons. (KEYSTONE/SCIENCE PHOTO LIBRARY/DETLEV VAN RAVENSWAAY/SCIENCE PHOTO LIBRARY)